| 1 | /* IBM S/390-specific support for 64-bit ELF |
| 2 | Copyright (C) 2000-2018 Free Software Foundation, Inc. |
| 3 | Contributed Martin Schwidefsky (schwidefsky@de.ibm.com). |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA |
| 20 | 02110-1301, USA. */ |
| 21 | |
| 22 | #include "sysdep.h" |
| 23 | #include "bfd.h" |
| 24 | #include "bfdlink.h" |
| 25 | #include "libbfd.h" |
| 26 | #include "elf-bfd.h" |
| 27 | #include "elf/s390.h" |
| 28 | #include "elf-s390.h" |
| 29 | #include <stdarg.h> |
| 30 | |
| 31 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value |
| 32 | from smaller values. Start with zero, widen, *then* decrement. */ |
| 33 | #define MINUS_ONE (((bfd_vma)0) - 1) |
| 34 | |
| 35 | static bfd_reloc_status_type |
| 36 | s390_tls_reloc (bfd *, arelent *, asymbol *, void *, |
| 37 | asection *, bfd *, char **); |
| 38 | static bfd_reloc_status_type |
| 39 | s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *, |
| 40 | asection *, bfd *, char **); |
| 41 | |
| 42 | /* The relocation "howto" table. */ |
| 43 | static reloc_howto_type elf_howto_table[] = |
| 44 | { |
| 45 | HOWTO (R_390_NONE, /* type */ |
| 46 | 0, /* rightshift */ |
| 47 | 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */ |
| 48 | 0, /* bitsize */ |
| 49 | FALSE, /* pc_relative */ |
| 50 | 0, /* bitpos */ |
| 51 | complain_overflow_dont, /* complain_on_overflow */ |
| 52 | bfd_elf_generic_reloc, /* special_function */ |
| 53 | "R_390_NONE", /* name */ |
| 54 | FALSE, /* partial_inplace */ |
| 55 | 0, /* src_mask */ |
| 56 | 0, /* dst_mask */ |
| 57 | FALSE), /* pcrel_offset */ |
| 58 | |
| 59 | HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
| 60 | bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), |
| 61 | HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, |
| 62 | bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), |
| 63 | HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, |
| 64 | bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), |
| 65 | HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 66 | bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), |
| 67 | HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| 68 | bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), |
| 69 | HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield, |
| 70 | bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), |
| 71 | HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 72 | bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), |
| 73 | HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| 74 | bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), |
| 75 | HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 76 | bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE), |
| 77 | HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 78 | bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE), |
| 79 | HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 80 | bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE), |
| 81 | HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
| 82 | bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE), |
| 83 | HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 84 | bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE), |
| 85 | HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
| 86 | bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE), |
| 87 | HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, |
| 88 | bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), |
| 89 | HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
| 90 | bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), |
| 91 | HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, |
| 92 | bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), |
| 93 | HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, |
| 94 | bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), |
| 95 | HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| 96 | bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), |
| 97 | HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| 98 | bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), |
| 99 | HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| 100 | bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE), |
| 101 | HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 102 | bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE), |
| 103 | HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
| 104 | bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE), |
| 105 | HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 106 | bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE), |
| 107 | HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
| 108 | bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE), |
| 109 | HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| 110 | bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE), |
| 111 | HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, |
| 112 | bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), |
| 113 | HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 114 | bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE), |
| 115 | HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, |
| 116 | bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), |
| 117 | HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, |
| 118 | bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), |
| 119 | HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 120 | bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), |
| 121 | HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 122 | bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE), |
| 123 | HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| 124 | bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE), |
| 125 | HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, |
| 126 | bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE), |
| 127 | HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 128 | bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), |
| 129 | HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 130 | bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE), |
| 131 | HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
| 132 | s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), |
| 133 | HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
| 134 | s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE), |
| 135 | HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
| 136 | s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), |
| 137 | EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */ |
| 138 | HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 139 | bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE), |
| 140 | HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, |
| 141 | bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), |
| 142 | EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */ |
| 143 | HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 144 | bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE), |
| 145 | EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */ |
| 146 | HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 147 | bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE), |
| 148 | EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */ |
| 149 | HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 150 | bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE), |
| 151 | HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| 152 | bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE), |
| 153 | EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */ |
| 154 | HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 155 | bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE), |
| 156 | EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */ |
| 157 | HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 158 | bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE), |
| 159 | HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 160 | bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE), |
| 161 | HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 162 | bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE), |
| 163 | HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 164 | bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE), |
| 165 | HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont, |
| 166 | s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE), |
| 167 | HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, |
| 168 | s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE), |
| 169 | HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, |
| 170 | s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE), |
| 171 | HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont, |
| 172 | s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE), |
| 173 | HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 174 | bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE), |
| 175 | HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, |
| 176 | bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE), |
| 177 | HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, |
| 178 | bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE), |
| 179 | HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, |
| 180 | bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE), |
| 181 | HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, |
| 182 | bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE), |
| 183 | }; |
| 184 | |
| 185 | /* GNU extension to record C++ vtable hierarchy. */ |
| 186 | static reloc_howto_type elf64_s390_vtinherit_howto = |
| 187 | HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE); |
| 188 | static reloc_howto_type elf64_s390_vtentry_howto = |
| 189 | HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE); |
| 190 | |
| 191 | static reloc_howto_type * |
| 192 | elf_s390_reloc_type_lookup (bfd *abfd, |
| 193 | bfd_reloc_code_real_type code) |
| 194 | { |
| 195 | switch (code) |
| 196 | { |
| 197 | case BFD_RELOC_NONE: |
| 198 | return &elf_howto_table[(int) R_390_NONE]; |
| 199 | case BFD_RELOC_8: |
| 200 | return &elf_howto_table[(int) R_390_8]; |
| 201 | case BFD_RELOC_390_12: |
| 202 | return &elf_howto_table[(int) R_390_12]; |
| 203 | case BFD_RELOC_16: |
| 204 | return &elf_howto_table[(int) R_390_16]; |
| 205 | case BFD_RELOC_32: |
| 206 | return &elf_howto_table[(int) R_390_32]; |
| 207 | case BFD_RELOC_CTOR: |
| 208 | return &elf_howto_table[(int) R_390_32]; |
| 209 | case BFD_RELOC_32_PCREL: |
| 210 | return &elf_howto_table[(int) R_390_PC32]; |
| 211 | case BFD_RELOC_390_GOT12: |
| 212 | return &elf_howto_table[(int) R_390_GOT12]; |
| 213 | case BFD_RELOC_32_GOT_PCREL: |
| 214 | return &elf_howto_table[(int) R_390_GOT32]; |
| 215 | case BFD_RELOC_390_PLT32: |
| 216 | return &elf_howto_table[(int) R_390_PLT32]; |
| 217 | case BFD_RELOC_390_COPY: |
| 218 | return &elf_howto_table[(int) R_390_COPY]; |
| 219 | case BFD_RELOC_390_GLOB_DAT: |
| 220 | return &elf_howto_table[(int) R_390_GLOB_DAT]; |
| 221 | case BFD_RELOC_390_JMP_SLOT: |
| 222 | return &elf_howto_table[(int) R_390_JMP_SLOT]; |
| 223 | case BFD_RELOC_390_RELATIVE: |
| 224 | return &elf_howto_table[(int) R_390_RELATIVE]; |
| 225 | case BFD_RELOC_32_GOTOFF: |
| 226 | return &elf_howto_table[(int) R_390_GOTOFF32]; |
| 227 | case BFD_RELOC_390_GOTPC: |
| 228 | return &elf_howto_table[(int) R_390_GOTPC]; |
| 229 | case BFD_RELOC_390_GOT16: |
| 230 | return &elf_howto_table[(int) R_390_GOT16]; |
| 231 | case BFD_RELOC_16_PCREL: |
| 232 | return &elf_howto_table[(int) R_390_PC16]; |
| 233 | case BFD_RELOC_390_PC12DBL: |
| 234 | return &elf_howto_table[(int) R_390_PC12DBL]; |
| 235 | case BFD_RELOC_390_PLT12DBL: |
| 236 | return &elf_howto_table[(int) R_390_PLT12DBL]; |
| 237 | case BFD_RELOC_390_PC16DBL: |
| 238 | return &elf_howto_table[(int) R_390_PC16DBL]; |
| 239 | case BFD_RELOC_390_PLT16DBL: |
| 240 | return &elf_howto_table[(int) R_390_PLT16DBL]; |
| 241 | case BFD_RELOC_390_PC24DBL: |
| 242 | return &elf_howto_table[(int) R_390_PC24DBL]; |
| 243 | case BFD_RELOC_390_PLT24DBL: |
| 244 | return &elf_howto_table[(int) R_390_PLT24DBL]; |
| 245 | case BFD_RELOC_390_PC32DBL: |
| 246 | return &elf_howto_table[(int) R_390_PC32DBL]; |
| 247 | case BFD_RELOC_390_PLT32DBL: |
| 248 | return &elf_howto_table[(int) R_390_PLT32DBL]; |
| 249 | case BFD_RELOC_390_GOTPCDBL: |
| 250 | return &elf_howto_table[(int) R_390_GOTPCDBL]; |
| 251 | case BFD_RELOC_64: |
| 252 | return &elf_howto_table[(int) R_390_64]; |
| 253 | case BFD_RELOC_64_PCREL: |
| 254 | return &elf_howto_table[(int) R_390_PC64]; |
| 255 | case BFD_RELOC_390_GOT64: |
| 256 | return &elf_howto_table[(int) R_390_GOT64]; |
| 257 | case BFD_RELOC_390_PLT64: |
| 258 | return &elf_howto_table[(int) R_390_PLT64]; |
| 259 | case BFD_RELOC_390_GOTENT: |
| 260 | return &elf_howto_table[(int) R_390_GOTENT]; |
| 261 | case BFD_RELOC_16_GOTOFF: |
| 262 | return &elf_howto_table[(int) R_390_GOTOFF16]; |
| 263 | case BFD_RELOC_390_GOTOFF64: |
| 264 | return &elf_howto_table[(int) R_390_GOTOFF64]; |
| 265 | case BFD_RELOC_390_GOTPLT12: |
| 266 | return &elf_howto_table[(int) R_390_GOTPLT12]; |
| 267 | case BFD_RELOC_390_GOTPLT16: |
| 268 | return &elf_howto_table[(int) R_390_GOTPLT16]; |
| 269 | case BFD_RELOC_390_GOTPLT32: |
| 270 | return &elf_howto_table[(int) R_390_GOTPLT32]; |
| 271 | case BFD_RELOC_390_GOTPLT64: |
| 272 | return &elf_howto_table[(int) R_390_GOTPLT64]; |
| 273 | case BFD_RELOC_390_GOTPLTENT: |
| 274 | return &elf_howto_table[(int) R_390_GOTPLTENT]; |
| 275 | case BFD_RELOC_390_PLTOFF16: |
| 276 | return &elf_howto_table[(int) R_390_PLTOFF16]; |
| 277 | case BFD_RELOC_390_PLTOFF32: |
| 278 | return &elf_howto_table[(int) R_390_PLTOFF32]; |
| 279 | case BFD_RELOC_390_PLTOFF64: |
| 280 | return &elf_howto_table[(int) R_390_PLTOFF64]; |
| 281 | case BFD_RELOC_390_TLS_LOAD: |
| 282 | return &elf_howto_table[(int) R_390_TLS_LOAD]; |
| 283 | case BFD_RELOC_390_TLS_GDCALL: |
| 284 | return &elf_howto_table[(int) R_390_TLS_GDCALL]; |
| 285 | case BFD_RELOC_390_TLS_LDCALL: |
| 286 | return &elf_howto_table[(int) R_390_TLS_LDCALL]; |
| 287 | case BFD_RELOC_390_TLS_GD64: |
| 288 | return &elf_howto_table[(int) R_390_TLS_GD64]; |
| 289 | case BFD_RELOC_390_TLS_GOTIE12: |
| 290 | return &elf_howto_table[(int) R_390_TLS_GOTIE12]; |
| 291 | case BFD_RELOC_390_TLS_GOTIE64: |
| 292 | return &elf_howto_table[(int) R_390_TLS_GOTIE64]; |
| 293 | case BFD_RELOC_390_TLS_LDM64: |
| 294 | return &elf_howto_table[(int) R_390_TLS_LDM64]; |
| 295 | case BFD_RELOC_390_TLS_IE64: |
| 296 | return &elf_howto_table[(int) R_390_TLS_IE64]; |
| 297 | case BFD_RELOC_390_TLS_IEENT: |
| 298 | return &elf_howto_table[(int) R_390_TLS_IEENT]; |
| 299 | case BFD_RELOC_390_TLS_LE64: |
| 300 | return &elf_howto_table[(int) R_390_TLS_LE64]; |
| 301 | case BFD_RELOC_390_TLS_LDO64: |
| 302 | return &elf_howto_table[(int) R_390_TLS_LDO64]; |
| 303 | case BFD_RELOC_390_TLS_DTPMOD: |
| 304 | return &elf_howto_table[(int) R_390_TLS_DTPMOD]; |
| 305 | case BFD_RELOC_390_TLS_DTPOFF: |
| 306 | return &elf_howto_table[(int) R_390_TLS_DTPOFF]; |
| 307 | case BFD_RELOC_390_TLS_TPOFF: |
| 308 | return &elf_howto_table[(int) R_390_TLS_TPOFF]; |
| 309 | case BFD_RELOC_390_20: |
| 310 | return &elf_howto_table[(int) R_390_20]; |
| 311 | case BFD_RELOC_390_GOT20: |
| 312 | return &elf_howto_table[(int) R_390_GOT20]; |
| 313 | case BFD_RELOC_390_GOTPLT20: |
| 314 | return &elf_howto_table[(int) R_390_GOTPLT20]; |
| 315 | case BFD_RELOC_390_TLS_GOTIE20: |
| 316 | return &elf_howto_table[(int) R_390_TLS_GOTIE20]; |
| 317 | case BFD_RELOC_390_IRELATIVE: |
| 318 | return &elf_howto_table[(int) R_390_IRELATIVE]; |
| 319 | case BFD_RELOC_VTABLE_INHERIT: |
| 320 | return &elf64_s390_vtinherit_howto; |
| 321 | case BFD_RELOC_VTABLE_ENTRY: |
| 322 | return &elf64_s390_vtentry_howto; |
| 323 | default: |
| 324 | break; |
| 325 | } |
| 326 | |
| 327 | /* xgettext:c-format */ |
| 328 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, (int) code); |
| 329 | bfd_set_error (bfd_error_bad_value); |
| 330 | return NULL; |
| 331 | } |
| 332 | |
| 333 | static reloc_howto_type * |
| 334 | elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 335 | const char *r_name) |
| 336 | { |
| 337 | unsigned int i; |
| 338 | |
| 339 | for (i = 0; |
| 340 | i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); |
| 341 | i++) |
| 342 | if (elf_howto_table[i].name != NULL |
| 343 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) |
| 344 | return &elf_howto_table[i]; |
| 345 | |
| 346 | if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0) |
| 347 | return &elf64_s390_vtinherit_howto; |
| 348 | if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0) |
| 349 | return &elf64_s390_vtentry_howto; |
| 350 | |
| 351 | return NULL; |
| 352 | } |
| 353 | |
| 354 | /* We need to use ELF64_R_TYPE so we have our own copy of this function, |
| 355 | and elf64-s390.c has its own copy. */ |
| 356 | |
| 357 | static bfd_boolean |
| 358 | elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, |
| 359 | arelent *cache_ptr, |
| 360 | Elf_Internal_Rela *dst) |
| 361 | { |
| 362 | unsigned int r_type = ELF64_R_TYPE(dst->r_info); |
| 363 | |
| 364 | switch (r_type) |
| 365 | { |
| 366 | case R_390_GNU_VTINHERIT: |
| 367 | cache_ptr->howto = &elf64_s390_vtinherit_howto; |
| 368 | break; |
| 369 | |
| 370 | case R_390_GNU_VTENTRY: |
| 371 | cache_ptr->howto = &elf64_s390_vtentry_howto; |
| 372 | break; |
| 373 | |
| 374 | default: |
| 375 | if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0])) |
| 376 | { |
| 377 | /* xgettext:c-format */ |
| 378 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
| 379 | abfd, r_type); |
| 380 | bfd_set_error (bfd_error_bad_value); |
| 381 | return FALSE; |
| 382 | } |
| 383 | cache_ptr->howto = &elf_howto_table[r_type]; |
| 384 | } |
| 385 | return TRUE; |
| 386 | } |
| 387 | |
| 388 | /* A relocation function which doesn't do anything. */ |
| 389 | static bfd_reloc_status_type |
| 390 | s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
| 391 | arelent *reloc_entry, |
| 392 | asymbol *symbol ATTRIBUTE_UNUSED, |
| 393 | void * data ATTRIBUTE_UNUSED, |
| 394 | asection *input_section, |
| 395 | bfd *output_bfd, |
| 396 | char **error_message ATTRIBUTE_UNUSED) |
| 397 | { |
| 398 | if (output_bfd) |
| 399 | reloc_entry->address += input_section->output_offset; |
| 400 | return bfd_reloc_ok; |
| 401 | } |
| 402 | |
| 403 | /* Handle the large displacement relocs. */ |
| 404 | static bfd_reloc_status_type |
| 405 | s390_elf_ldisp_reloc (bfd *abfd, |
| 406 | arelent *reloc_entry, |
| 407 | asymbol *symbol, |
| 408 | void * data, |
| 409 | asection *input_section, |
| 410 | bfd *output_bfd, |
| 411 | char **error_message ATTRIBUTE_UNUSED) |
| 412 | { |
| 413 | reloc_howto_type *howto = reloc_entry->howto; |
| 414 | bfd_vma relocation; |
| 415 | bfd_vma insn; |
| 416 | |
| 417 | if (output_bfd != (bfd *) NULL |
| 418 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 419 | && (! howto->partial_inplace |
| 420 | || reloc_entry->addend == 0)) |
| 421 | { |
| 422 | reloc_entry->address += input_section->output_offset; |
| 423 | return bfd_reloc_ok; |
| 424 | } |
| 425 | if (output_bfd != NULL) |
| 426 | return bfd_reloc_continue; |
| 427 | |
| 428 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 429 | return bfd_reloc_outofrange; |
| 430 | |
| 431 | relocation = (symbol->value |
| 432 | + symbol->section->output_section->vma |
| 433 | + symbol->section->output_offset); |
| 434 | relocation += reloc_entry->addend; |
| 435 | if (howto->pc_relative) |
| 436 | { |
| 437 | relocation -= (input_section->output_section->vma |
| 438 | + input_section->output_offset); |
| 439 | relocation -= reloc_entry->address; |
| 440 | } |
| 441 | |
| 442 | insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 443 | insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4; |
| 444 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); |
| 445 | |
| 446 | if ((bfd_signed_vma) relocation < - 0x80000 |
| 447 | || (bfd_signed_vma) relocation > 0x7ffff) |
| 448 | return bfd_reloc_overflow; |
| 449 | else |
| 450 | return bfd_reloc_ok; |
| 451 | } |
| 452 | |
| 453 | static bfd_boolean |
| 454 | elf_s390_is_local_label_name (bfd *abfd, const char *name) |
| 455 | { |
| 456 | if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) |
| 457 | return TRUE; |
| 458 | |
| 459 | return _bfd_elf_is_local_label_name (abfd, name); |
| 460 | } |
| 461 | |
| 462 | /* Functions for the 390 ELF linker. */ |
| 463 | |
| 464 | /* The name of the dynamic interpreter. This is put in the .interp |
| 465 | section. */ |
| 466 | |
| 467 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1" |
| 468 | |
| 469 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
| 470 | copying dynamic variables from a shared lib into an app's dynbss |
| 471 | section, and instead use a dynamic relocation to point into the |
| 472 | shared lib. */ |
| 473 | #define ELIMINATE_COPY_RELOCS 1 |
| 474 | |
| 475 | /* The size in bytes of the first entry in the procedure linkage table. */ |
| 476 | #define PLT_FIRST_ENTRY_SIZE 32 |
| 477 | /* The size in bytes of an entry in the procedure linkage table. */ |
| 478 | #define PLT_ENTRY_SIZE 32 |
| 479 | |
| 480 | #define GOT_ENTRY_SIZE 8 |
| 481 | |
| 482 | #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela) |
| 483 | |
| 484 | /* The first three entries in a global offset table are reserved, |
| 485 | and the initial contents are unimportant (we zero them out). |
| 486 | Subsequent entries look like this. See the SVR4 ABI 386 |
| 487 | supplement to see how this works. */ |
| 488 | |
| 489 | /* For the s390, simple addr offset can only be 0 - 4096. |
| 490 | To use the full 16777216 TB address space, several instructions |
| 491 | are needed to load an address in a register and execute |
| 492 | a branch( or just saving the address) |
| 493 | |
| 494 | Furthermore, only r 0 and 1 are free to use!!! */ |
| 495 | |
| 496 | /* The first 3 words in the GOT are then reserved. |
| 497 | Word 0 is the address of the dynamic table. |
| 498 | Word 1 is a pointer to a structure describing the object |
| 499 | Word 2 is used to point to the loader entry address. |
| 500 | |
| 501 | The code for PLT entries looks like this: |
| 502 | |
| 503 | The GOT holds the address in the PLT to be executed. |
| 504 | The loader then gets: |
| 505 | 48(15) = Pointer to the structure describing the object. |
| 506 | 56(15) = Offset in symbol table |
| 507 | The loader must then find the module where the function is |
| 508 | and insert the address in the GOT. |
| 509 | |
| 510 | PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1 |
| 511 | LG 1,0(1) # 6 bytes Load address from GOT in r1 |
| 512 | BCR 15,1 # 2 bytes Jump to address |
| 513 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time |
| 514 | LGF 1,12(1) # 6 bytes Load rela.plt offset into r1 |
| 515 | BRCL 15,-x # 6 bytes Jump to first PLT entry |
| 516 | .long ? # 4 bytes offset into .rela.plt |
| 517 | |
| 518 | Total = 32 bytes per PLT entry |
| 519 | Fixup at offset 2: relative address to GOT entry |
| 520 | Fixup at offset 22: relative branch to PLT0 |
| 521 | Fixup at offset 28: 32 bit offset into .rela.plt |
| 522 | |
| 523 | A 32 bit offset into the symbol table is enough. It allows for |
| 524 | .rela.plt sections up to a size of 2 gigabyte. A single dynamic |
| 525 | object (the main program, any shared library) is limited to 4GB in |
| 526 | size. Having a .rela.plt of 2GB would already make the .plt |
| 527 | section bigger than 8GB. */ |
| 528 | |
| 529 | static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] = |
| 530 | { |
| 531 | 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */ |
| 532 | 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */ |
| 533 | 0x07, 0xf1, /* br %r1 */ |
| 534 | 0x0d, 0x10, /* basr %r1,%r0 */ |
| 535 | 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */ |
| 536 | 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */ |
| 537 | 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */ |
| 538 | }; |
| 539 | |
| 540 | /* The first PLT entry pushes the offset into the symbol table |
| 541 | from R1 onto the stack at 56(15) and the loader object info |
| 542 | at 48(15), loads the loader address in R1 and jumps to it. */ |
| 543 | |
| 544 | /* The first entry in the PLT: |
| 545 | |
| 546 | PLT0: |
| 547 | STG 1,56(15) # r1 contains the offset into the symbol table |
| 548 | LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table |
| 549 | MVC 48(8,15),8(1) # move loader ino (object struct address) to stack |
| 550 | LG 1,16(1) # get entry address of loader |
| 551 | BCR 15,1 # jump to loader |
| 552 | |
| 553 | Fixup at offset 8: relative address to start of GOT. */ |
| 554 | |
| 555 | static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] = |
| 556 | { |
| 557 | 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */ |
| 558 | 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */ |
| 559 | 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */ |
| 560 | 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */ |
| 561 | 0x07, 0xf1, /* br %r1 */ |
| 562 | 0x07, 0x00, /* nopr %r0 */ |
| 563 | 0x07, 0x00, /* nopr %r0 */ |
| 564 | 0x07, 0x00 /* nopr %r0 */ |
| 565 | }; |
| 566 | |
| 567 | |
| 568 | /* s390 ELF linker hash entry. */ |
| 569 | |
| 570 | struct elf_s390_link_hash_entry |
| 571 | { |
| 572 | struct elf_link_hash_entry elf; |
| 573 | |
| 574 | /* Track dynamic relocs copied for this symbol. */ |
| 575 | struct elf_dyn_relocs *dyn_relocs; |
| 576 | |
| 577 | /* Number of GOTPLT references for a function. */ |
| 578 | bfd_signed_vma gotplt_refcount; |
| 579 | |
| 580 | #define GOT_UNKNOWN 0 |
| 581 | #define GOT_NORMAL 1 |
| 582 | #define GOT_TLS_GD 2 |
| 583 | #define GOT_TLS_IE 3 |
| 584 | #define GOT_TLS_IE_NLT 3 |
| 585 | unsigned char tls_type; |
| 586 | |
| 587 | /* For pointer equality reasons we might need to change the symbol |
| 588 | type from STT_GNU_IFUNC to STT_FUNC together with its value and |
| 589 | section entry. So after alloc_dynrelocs only these values should |
| 590 | be used. In order to check whether a symbol is IFUNC use |
| 591 | s390_is_ifunc_symbol_p. */ |
| 592 | bfd_vma ifunc_resolver_address; |
| 593 | asection *ifunc_resolver_section; |
| 594 | }; |
| 595 | |
| 596 | #define elf_s390_hash_entry(ent) \ |
| 597 | ((struct elf_s390_link_hash_entry *)(ent)) |
| 598 | |
| 599 | /* This structure represents an entry in the local PLT list needed for |
| 600 | local IFUNC symbols. */ |
| 601 | struct plt_entry |
| 602 | { |
| 603 | /* The section of the local symbol. |
| 604 | Set in relocate_section and used in finish_dynamic_sections. */ |
| 605 | asection *sec; |
| 606 | |
| 607 | union |
| 608 | { |
| 609 | bfd_signed_vma refcount; |
| 610 | bfd_vma offset; |
| 611 | } plt; |
| 612 | }; |
| 613 | |
| 614 | /* NOTE: Keep this structure in sync with |
| 615 | the one declared in elf32-s390.c. */ |
| 616 | struct elf_s390_obj_tdata |
| 617 | { |
| 618 | struct elf_obj_tdata root; |
| 619 | |
| 620 | /* A local PLT is needed for ifunc symbols. */ |
| 621 | struct plt_entry *local_plt; |
| 622 | |
| 623 | /* TLS type for each local got entry. */ |
| 624 | char *local_got_tls_type; |
| 625 | }; |
| 626 | |
| 627 | #define elf_s390_tdata(abfd) \ |
| 628 | ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) |
| 629 | |
| 630 | #define elf_s390_local_plt(abfd) \ |
| 631 | (elf_s390_tdata (abfd)->local_plt) |
| 632 | |
| 633 | #define elf_s390_local_got_tls_type(abfd) \ |
| 634 | (elf_s390_tdata (abfd)->local_got_tls_type) |
| 635 | |
| 636 | #define is_s390_elf(bfd) \ |
| 637 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ |
| 638 | && elf_tdata (bfd) != NULL \ |
| 639 | && elf_object_id (bfd) == S390_ELF_DATA) |
| 640 | |
| 641 | static bfd_boolean |
| 642 | elf_s390_mkobject (bfd *abfd) |
| 643 | { |
| 644 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata), |
| 645 | S390_ELF_DATA); |
| 646 | } |
| 647 | |
| 648 | static bfd_boolean |
| 649 | elf_s390_object_p (bfd *abfd) |
| 650 | { |
| 651 | /* Set the right machine number for an s390 elf32 file. */ |
| 652 | return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64); |
| 653 | } |
| 654 | |
| 655 | /* s390 ELF linker hash table. */ |
| 656 | |
| 657 | struct elf_s390_link_hash_table |
| 658 | { |
| 659 | struct elf_link_hash_table elf; |
| 660 | |
| 661 | /* Short-cuts to get to dynamic linker sections. */ |
| 662 | asection *irelifunc; |
| 663 | |
| 664 | union { |
| 665 | bfd_signed_vma refcount; |
| 666 | bfd_vma offset; |
| 667 | } tls_ldm_got; |
| 668 | |
| 669 | /* Small local sym cache. */ |
| 670 | struct sym_cache sym_cache; |
| 671 | |
| 672 | /* Options passed from the linker. */ |
| 673 | struct s390_elf_params *params; |
| 674 | }; |
| 675 | |
| 676 | /* Get the s390 ELF linker hash table from a link_info structure. */ |
| 677 | |
| 678 | #define elf_s390_hash_table(p) \ |
| 679 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
| 680 | == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL) |
| 681 | |
| 682 | #define ELF64 1 |
| 683 | #include "elf-s390-common.c" |
| 684 | |
| 685 | /* Create an entry in an s390 ELF linker hash table. */ |
| 686 | |
| 687 | static struct bfd_hash_entry * |
| 688 | link_hash_newfunc (struct bfd_hash_entry *entry, |
| 689 | struct bfd_hash_table *table, |
| 690 | const char *string) |
| 691 | { |
| 692 | /* Allocate the structure if it has not already been allocated by a |
| 693 | subclass. */ |
| 694 | if (entry == NULL) |
| 695 | { |
| 696 | entry = bfd_hash_allocate (table, |
| 697 | sizeof (struct elf_s390_link_hash_entry)); |
| 698 | if (entry == NULL) |
| 699 | return entry; |
| 700 | } |
| 701 | |
| 702 | /* Call the allocation method of the superclass. */ |
| 703 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
| 704 | if (entry != NULL) |
| 705 | { |
| 706 | struct elf_s390_link_hash_entry *eh; |
| 707 | |
| 708 | eh = (struct elf_s390_link_hash_entry *) entry; |
| 709 | eh->dyn_relocs = NULL; |
| 710 | eh->gotplt_refcount = 0; |
| 711 | eh->tls_type = GOT_UNKNOWN; |
| 712 | eh->ifunc_resolver_address = 0; |
| 713 | eh->ifunc_resolver_section = NULL; |
| 714 | } |
| 715 | |
| 716 | return entry; |
| 717 | } |
| 718 | |
| 719 | /* Create an s390 ELF linker hash table. */ |
| 720 | |
| 721 | static struct bfd_link_hash_table * |
| 722 | elf_s390_link_hash_table_create (bfd *abfd) |
| 723 | { |
| 724 | struct elf_s390_link_hash_table *ret; |
| 725 | bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); |
| 726 | |
| 727 | ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt); |
| 728 | if (ret == NULL) |
| 729 | return NULL; |
| 730 | |
| 731 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, |
| 732 | sizeof (struct elf_s390_link_hash_entry), |
| 733 | S390_ELF_DATA)) |
| 734 | { |
| 735 | free (ret); |
| 736 | return NULL; |
| 737 | } |
| 738 | |
| 739 | return &ret->elf.root; |
| 740 | } |
| 741 | |
| 742 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 743 | |
| 744 | static void |
| 745 | elf_s390_copy_indirect_symbol (struct bfd_link_info *info, |
| 746 | struct elf_link_hash_entry *dir, |
| 747 | struct elf_link_hash_entry *ind) |
| 748 | { |
| 749 | struct elf_s390_link_hash_entry *edir, *eind; |
| 750 | |
| 751 | edir = (struct elf_s390_link_hash_entry *) dir; |
| 752 | eind = (struct elf_s390_link_hash_entry *) ind; |
| 753 | |
| 754 | if (eind->dyn_relocs != NULL) |
| 755 | { |
| 756 | if (edir->dyn_relocs != NULL) |
| 757 | { |
| 758 | struct elf_dyn_relocs **pp; |
| 759 | struct elf_dyn_relocs *p; |
| 760 | |
| 761 | /* Add reloc counts against the indirect sym to the direct sym |
| 762 | list. Merge any entries against the same section. */ |
| 763 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) |
| 764 | { |
| 765 | struct elf_dyn_relocs *q; |
| 766 | |
| 767 | for (q = edir->dyn_relocs; q != NULL; q = q->next) |
| 768 | if (q->sec == p->sec) |
| 769 | { |
| 770 | q->pc_count += p->pc_count; |
| 771 | q->count += p->count; |
| 772 | *pp = p->next; |
| 773 | break; |
| 774 | } |
| 775 | if (q == NULL) |
| 776 | pp = &p->next; |
| 777 | } |
| 778 | *pp = edir->dyn_relocs; |
| 779 | } |
| 780 | |
| 781 | edir->dyn_relocs = eind->dyn_relocs; |
| 782 | eind->dyn_relocs = NULL; |
| 783 | } |
| 784 | |
| 785 | if (ind->root.type == bfd_link_hash_indirect |
| 786 | && dir->got.refcount <= 0) |
| 787 | { |
| 788 | edir->tls_type = eind->tls_type; |
| 789 | eind->tls_type = GOT_UNKNOWN; |
| 790 | } |
| 791 | |
| 792 | if (ELIMINATE_COPY_RELOCS |
| 793 | && ind->root.type != bfd_link_hash_indirect |
| 794 | && dir->dynamic_adjusted) |
| 795 | { |
| 796 | /* If called to transfer flags for a weakdef during processing |
| 797 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. |
| 798 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ |
| 799 | if (dir->versioned != versioned_hidden) |
| 800 | dir->ref_dynamic |= ind->ref_dynamic; |
| 801 | dir->ref_regular |= ind->ref_regular; |
| 802 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; |
| 803 | dir->needs_plt |= ind->needs_plt; |
| 804 | } |
| 805 | else |
| 806 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
| 807 | } |
| 808 | |
| 809 | static int |
| 810 | elf_s390_tls_transition (struct bfd_link_info *info, |
| 811 | int r_type, |
| 812 | int is_local) |
| 813 | { |
| 814 | if (bfd_link_pic (info)) |
| 815 | return r_type; |
| 816 | |
| 817 | switch (r_type) |
| 818 | { |
| 819 | case R_390_TLS_GD64: |
| 820 | case R_390_TLS_IE64: |
| 821 | if (is_local) |
| 822 | return R_390_TLS_LE64; |
| 823 | return R_390_TLS_IE64; |
| 824 | case R_390_TLS_GOTIE64: |
| 825 | if (is_local) |
| 826 | return R_390_TLS_LE64; |
| 827 | return R_390_TLS_GOTIE64; |
| 828 | case R_390_TLS_LDM64: |
| 829 | return R_390_TLS_LE64; |
| 830 | } |
| 831 | |
| 832 | return r_type; |
| 833 | } |
| 834 | |
| 835 | /* Look through the relocs for a section during the first phase, and |
| 836 | allocate space in the global offset table or procedure linkage |
| 837 | table. */ |
| 838 | |
| 839 | static bfd_boolean |
| 840 | elf_s390_check_relocs (bfd *abfd, |
| 841 | struct bfd_link_info *info, |
| 842 | asection *sec, |
| 843 | const Elf_Internal_Rela *relocs) |
| 844 | { |
| 845 | struct elf_s390_link_hash_table *htab; |
| 846 | Elf_Internal_Shdr *symtab_hdr; |
| 847 | struct elf_link_hash_entry **sym_hashes; |
| 848 | const Elf_Internal_Rela *rel; |
| 849 | const Elf_Internal_Rela *rel_end; |
| 850 | asection *sreloc; |
| 851 | bfd_signed_vma *local_got_refcounts; |
| 852 | int tls_type, old_tls_type; |
| 853 | |
| 854 | if (bfd_link_relocatable (info)) |
| 855 | return TRUE; |
| 856 | |
| 857 | BFD_ASSERT (is_s390_elf (abfd)); |
| 858 | |
| 859 | htab = elf_s390_hash_table (info); |
| 860 | if (htab == NULL) |
| 861 | return FALSE; |
| 862 | |
| 863 | symtab_hdr = &elf_symtab_hdr (abfd); |
| 864 | sym_hashes = elf_sym_hashes (abfd); |
| 865 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 866 | |
| 867 | sreloc = NULL; |
| 868 | |
| 869 | rel_end = relocs + sec->reloc_count; |
| 870 | for (rel = relocs; rel < rel_end; rel++) |
| 871 | { |
| 872 | unsigned int r_type; |
| 873 | unsigned int r_symndx; |
| 874 | struct elf_link_hash_entry *h; |
| 875 | Elf_Internal_Sym *isym; |
| 876 | |
| 877 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 878 | |
| 879 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
| 880 | { |
| 881 | /* xgettext:c-format */ |
| 882 | _bfd_error_handler (_("%pB: bad symbol index: %d"), |
| 883 | abfd, r_symndx); |
| 884 | return FALSE; |
| 885 | } |
| 886 | |
| 887 | if (r_symndx < symtab_hdr->sh_info) |
| 888 | { |
| 889 | /* A local symbol. */ |
| 890 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 891 | abfd, r_symndx); |
| 892 | if (isym == NULL) |
| 893 | return FALSE; |
| 894 | |
| 895 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
| 896 | { |
| 897 | struct plt_entry *plt; |
| 898 | |
| 899 | if (htab->elf.dynobj == NULL) |
| 900 | htab->elf.dynobj = abfd; |
| 901 | |
| 902 | if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info)) |
| 903 | return FALSE; |
| 904 | |
| 905 | if (local_got_refcounts == NULL) |
| 906 | { |
| 907 | if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr)) |
| 908 | return FALSE; |
| 909 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 910 | } |
| 911 | plt = elf_s390_local_plt (abfd); |
| 912 | plt[r_symndx].plt.refcount++; |
| 913 | } |
| 914 | h = NULL; |
| 915 | } |
| 916 | else |
| 917 | { |
| 918 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 919 | while (h->root.type == bfd_link_hash_indirect |
| 920 | || h->root.type == bfd_link_hash_warning) |
| 921 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 922 | } |
| 923 | |
| 924 | /* Create got section and local_got_refcounts array if they |
| 925 | are needed. */ |
| 926 | r_type = elf_s390_tls_transition (info, |
| 927 | ELF64_R_TYPE (rel->r_info), |
| 928 | h == NULL); |
| 929 | switch (r_type) |
| 930 | { |
| 931 | case R_390_GOT12: |
| 932 | case R_390_GOT16: |
| 933 | case R_390_GOT20: |
| 934 | case R_390_GOT32: |
| 935 | case R_390_GOT64: |
| 936 | case R_390_GOTENT: |
| 937 | case R_390_GOTPLT12: |
| 938 | case R_390_GOTPLT16: |
| 939 | case R_390_GOTPLT20: |
| 940 | case R_390_GOTPLT32: |
| 941 | case R_390_GOTPLT64: |
| 942 | case R_390_GOTPLTENT: |
| 943 | case R_390_TLS_GD64: |
| 944 | case R_390_TLS_GOTIE12: |
| 945 | case R_390_TLS_GOTIE20: |
| 946 | case R_390_TLS_GOTIE64: |
| 947 | case R_390_TLS_IEENT: |
| 948 | case R_390_TLS_IE64: |
| 949 | case R_390_TLS_LDM64: |
| 950 | if (h == NULL |
| 951 | && local_got_refcounts == NULL) |
| 952 | { |
| 953 | if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr)) |
| 954 | return FALSE; |
| 955 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 956 | } |
| 957 | |
| 958 | /* Fall through. */ |
| 959 | case R_390_GOTOFF16: |
| 960 | case R_390_GOTOFF32: |
| 961 | case R_390_GOTOFF64: |
| 962 | case R_390_GOTPC: |
| 963 | case R_390_GOTPCDBL: |
| 964 | if (htab->elf.sgot == NULL) |
| 965 | { |
| 966 | if (htab->elf.dynobj == NULL) |
| 967 | htab->elf.dynobj = abfd; |
| 968 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) |
| 969 | return FALSE; |
| 970 | } |
| 971 | } |
| 972 | |
| 973 | if (h != NULL) |
| 974 | { |
| 975 | if (htab->elf.dynobj == NULL) |
| 976 | htab->elf.dynobj = abfd; |
| 977 | if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info)) |
| 978 | return FALSE; |
| 979 | |
| 980 | /* Make sure an IFUNC symbol defined in a non-shared object |
| 981 | always gets a PLT slot. */ |
| 982 | if (s390_is_ifunc_symbol_p (h) && h->def_regular) |
| 983 | { |
| 984 | /* The symbol is called by the dynamic loader in order |
| 985 | to resolve the relocation. So it is in fact also |
| 986 | referenced. */ |
| 987 | h->ref_regular = 1; |
| 988 | h->needs_plt = 1; |
| 989 | } |
| 990 | } |
| 991 | |
| 992 | switch (r_type) |
| 993 | { |
| 994 | case R_390_GOTPC: |
| 995 | case R_390_GOTPCDBL: |
| 996 | /* These relocs do not need a GOT slot. They just load the |
| 997 | GOT pointer itself or address something else relative to |
| 998 | the GOT. Since the GOT pointer has been set up above we |
| 999 | are done. */ |
| 1000 | break; |
| 1001 | case R_390_GOTOFF16: |
| 1002 | case R_390_GOTOFF32: |
| 1003 | case R_390_GOTOFF64: |
| 1004 | if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular) |
| 1005 | break; |
| 1006 | /* Fall through. */ |
| 1007 | |
| 1008 | case R_390_PLT12DBL: |
| 1009 | case R_390_PLT16DBL: |
| 1010 | case R_390_PLT24DBL: |
| 1011 | case R_390_PLT32: |
| 1012 | case R_390_PLT32DBL: |
| 1013 | case R_390_PLT64: |
| 1014 | case R_390_PLTOFF16: |
| 1015 | case R_390_PLTOFF32: |
| 1016 | case R_390_PLTOFF64: |
| 1017 | /* This symbol requires a procedure linkage table entry. We |
| 1018 | actually build the entry in adjust_dynamic_symbol, |
| 1019 | because this might be a case of linking PIC code which is |
| 1020 | never referenced by a dynamic object, in which case we |
| 1021 | don't need to generate a procedure linkage table entry |
| 1022 | after all. */ |
| 1023 | |
| 1024 | /* If this is a local symbol, we resolve it directly without |
| 1025 | creating a procedure linkage table entry. */ |
| 1026 | if (h != NULL) |
| 1027 | { |
| 1028 | h->needs_plt = 1; |
| 1029 | h->plt.refcount += 1; |
| 1030 | } |
| 1031 | break; |
| 1032 | |
| 1033 | case R_390_GOTPLT12: |
| 1034 | case R_390_GOTPLT16: |
| 1035 | case R_390_GOTPLT20: |
| 1036 | case R_390_GOTPLT32: |
| 1037 | case R_390_GOTPLT64: |
| 1038 | case R_390_GOTPLTENT: |
| 1039 | /* This symbol requires either a procedure linkage table entry |
| 1040 | or an entry in the local got. We actually build the entry |
| 1041 | in adjust_dynamic_symbol because whether this is really a |
| 1042 | global reference can change and with it the fact if we have |
| 1043 | to create a plt entry or a local got entry. To be able to |
| 1044 | make a once global symbol a local one we have to keep track |
| 1045 | of the number of gotplt references that exist for this |
| 1046 | symbol. */ |
| 1047 | if (h != NULL) |
| 1048 | { |
| 1049 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; |
| 1050 | h->needs_plt = 1; |
| 1051 | h->plt.refcount += 1; |
| 1052 | } |
| 1053 | else |
| 1054 | local_got_refcounts[r_symndx] += 1; |
| 1055 | break; |
| 1056 | |
| 1057 | case R_390_TLS_LDM64: |
| 1058 | htab->tls_ldm_got.refcount += 1; |
| 1059 | break; |
| 1060 | |
| 1061 | case R_390_TLS_IE64: |
| 1062 | case R_390_TLS_GOTIE12: |
| 1063 | case R_390_TLS_GOTIE20: |
| 1064 | case R_390_TLS_GOTIE64: |
| 1065 | case R_390_TLS_IEENT: |
| 1066 | if (bfd_link_pic (info)) |
| 1067 | info->flags |= DF_STATIC_TLS; |
| 1068 | /* Fall through */ |
| 1069 | |
| 1070 | case R_390_GOT12: |
| 1071 | case R_390_GOT16: |
| 1072 | case R_390_GOT20: |
| 1073 | case R_390_GOT32: |
| 1074 | case R_390_GOT64: |
| 1075 | case R_390_GOTENT: |
| 1076 | case R_390_TLS_GD64: |
| 1077 | /* This symbol requires a global offset table entry. */ |
| 1078 | switch (r_type) |
| 1079 | { |
| 1080 | default: |
| 1081 | case R_390_GOT12: |
| 1082 | case R_390_GOT16: |
| 1083 | case R_390_GOT20: |
| 1084 | case R_390_GOT32: |
| 1085 | case R_390_GOTENT: |
| 1086 | tls_type = GOT_NORMAL; |
| 1087 | break; |
| 1088 | case R_390_TLS_GD64: |
| 1089 | tls_type = GOT_TLS_GD; |
| 1090 | break; |
| 1091 | case R_390_TLS_IE64: |
| 1092 | case R_390_TLS_GOTIE64: |
| 1093 | tls_type = GOT_TLS_IE; |
| 1094 | break; |
| 1095 | case R_390_TLS_GOTIE12: |
| 1096 | case R_390_TLS_GOTIE20: |
| 1097 | case R_390_TLS_IEENT: |
| 1098 | tls_type = GOT_TLS_IE_NLT; |
| 1099 | break; |
| 1100 | } |
| 1101 | |
| 1102 | if (h != NULL) |
| 1103 | { |
| 1104 | h->got.refcount += 1; |
| 1105 | old_tls_type = elf_s390_hash_entry(h)->tls_type; |
| 1106 | } |
| 1107 | else |
| 1108 | { |
| 1109 | local_got_refcounts[r_symndx] += 1; |
| 1110 | old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; |
| 1111 | } |
| 1112 | /* If a TLS symbol is accessed using IE at least once, |
| 1113 | there is no point to use dynamic model for it. */ |
| 1114 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) |
| 1115 | { |
| 1116 | if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) |
| 1117 | { |
| 1118 | _bfd_error_handler |
| 1119 | /* xgettext:c-format */ |
| 1120 | (_("%pB: `%s' accessed both as normal and thread local symbol"), |
| 1121 | abfd, h->root.root.string); |
| 1122 | return FALSE; |
| 1123 | } |
| 1124 | if (old_tls_type > tls_type) |
| 1125 | tls_type = old_tls_type; |
| 1126 | } |
| 1127 | |
| 1128 | if (old_tls_type != tls_type) |
| 1129 | { |
| 1130 | if (h != NULL) |
| 1131 | elf_s390_hash_entry (h)->tls_type = tls_type; |
| 1132 | else |
| 1133 | elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; |
| 1134 | } |
| 1135 | |
| 1136 | if (r_type != R_390_TLS_IE64) |
| 1137 | break; |
| 1138 | /* Fall through */ |
| 1139 | |
| 1140 | case R_390_TLS_LE64: |
| 1141 | /* For static linking and executables this reloc will be |
| 1142 | calculated at linktime otherwise a TLS_TPOFF runtime |
| 1143 | reloc will be generated. */ |
| 1144 | if (r_type == R_390_TLS_LE64 && bfd_link_pie (info)) |
| 1145 | break; |
| 1146 | |
| 1147 | if (!bfd_link_pic (info)) |
| 1148 | break; |
| 1149 | info->flags |= DF_STATIC_TLS; |
| 1150 | /* Fall through */ |
| 1151 | |
| 1152 | case R_390_8: |
| 1153 | case R_390_16: |
| 1154 | case R_390_32: |
| 1155 | case R_390_64: |
| 1156 | case R_390_PC12DBL: |
| 1157 | case R_390_PC16: |
| 1158 | case R_390_PC16DBL: |
| 1159 | case R_390_PC24DBL: |
| 1160 | case R_390_PC32: |
| 1161 | case R_390_PC32DBL: |
| 1162 | case R_390_PC64: |
| 1163 | if (h != NULL && bfd_link_executable (info)) |
| 1164 | { |
| 1165 | /* If this reloc is in a read-only section, we might |
| 1166 | need a copy reloc. We can't check reliably at this |
| 1167 | stage whether the section is read-only, as input |
| 1168 | sections have not yet been mapped to output sections. |
| 1169 | Tentatively set the flag for now, and correct in |
| 1170 | adjust_dynamic_symbol. */ |
| 1171 | h->non_got_ref = 1; |
| 1172 | |
| 1173 | if (!bfd_link_pic (info)) |
| 1174 | { |
| 1175 | /* We may need a .plt entry if the function this reloc |
| 1176 | refers to is in a shared lib. */ |
| 1177 | h->plt.refcount += 1; |
| 1178 | } |
| 1179 | } |
| 1180 | |
| 1181 | /* If we are creating a shared library, and this is a reloc |
| 1182 | against a global symbol, or a non PC relative reloc |
| 1183 | against a local symbol, then we need to copy the reloc |
| 1184 | into the shared library. However, if we are linking with |
| 1185 | -Bsymbolic, we do not need to copy a reloc against a |
| 1186 | global symbol which is defined in an object we are |
| 1187 | including in the link (i.e., DEF_REGULAR is set). At |
| 1188 | this point we have not seen all the input files, so it is |
| 1189 | possible that DEF_REGULAR is not set now but will be set |
| 1190 | later (it is never cleared). In case of a weak definition, |
| 1191 | DEF_REGULAR may be cleared later by a strong definition in |
| 1192 | a shared library. We account for that possibility below by |
| 1193 | storing information in the relocs_copied field of the hash |
| 1194 | table entry. A similar situation occurs when creating |
| 1195 | shared libraries and symbol visibility changes render the |
| 1196 | symbol local. |
| 1197 | |
| 1198 | If on the other hand, we are creating an executable, we |
| 1199 | may need to keep relocations for symbols satisfied by a |
| 1200 | dynamic library if we manage to avoid copy relocs for the |
| 1201 | symbol. */ |
| 1202 | if ((bfd_link_pic (info) |
| 1203 | && (sec->flags & SEC_ALLOC) != 0 |
| 1204 | && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16 |
| 1205 | && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL |
| 1206 | && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL |
| 1207 | && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL |
| 1208 | && ELF64_R_TYPE (rel->r_info) != R_390_PC32 |
| 1209 | && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL |
| 1210 | && ELF64_R_TYPE (rel->r_info) != R_390_PC64) |
| 1211 | || (h != NULL |
| 1212 | && (! SYMBOLIC_BIND (info, h) |
| 1213 | || h->root.type == bfd_link_hash_defweak |
| 1214 | || !h->def_regular)))) |
| 1215 | || (ELIMINATE_COPY_RELOCS |
| 1216 | && !bfd_link_pic (info) |
| 1217 | && (sec->flags & SEC_ALLOC) != 0 |
| 1218 | && h != NULL |
| 1219 | && (h->root.type == bfd_link_hash_defweak |
| 1220 | || !h->def_regular))) |
| 1221 | { |
| 1222 | struct elf_dyn_relocs *p; |
| 1223 | struct elf_dyn_relocs **head; |
| 1224 | |
| 1225 | /* We must copy these reloc types into the output file. |
| 1226 | Create a reloc section in dynobj and make room for |
| 1227 | this reloc. */ |
| 1228 | if (sreloc == NULL) |
| 1229 | { |
| 1230 | if (htab->elf.dynobj == NULL) |
| 1231 | htab->elf.dynobj = abfd; |
| 1232 | |
| 1233 | sreloc = _bfd_elf_make_dynamic_reloc_section |
| 1234 | (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE); |
| 1235 | |
| 1236 | if (sreloc == NULL) |
| 1237 | return FALSE; |
| 1238 | } |
| 1239 | |
| 1240 | /* If this is a global symbol, we count the number of |
| 1241 | relocations we need for this symbol. */ |
| 1242 | if (h != NULL) |
| 1243 | { |
| 1244 | head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; |
| 1245 | } |
| 1246 | else |
| 1247 | { |
| 1248 | /* Track dynamic relocs needed for local syms too. |
| 1249 | We really need local syms available to do this |
| 1250 | easily. Oh well. */ |
| 1251 | asection *s; |
| 1252 | void *vpp; |
| 1253 | |
| 1254 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 1255 | abfd, r_symndx); |
| 1256 | if (isym == NULL) |
| 1257 | return FALSE; |
| 1258 | |
| 1259 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 1260 | if (s == NULL) |
| 1261 | s = sec; |
| 1262 | |
| 1263 | vpp = &elf_section_data (s)->local_dynrel; |
| 1264 | head = (struct elf_dyn_relocs **) vpp; |
| 1265 | } |
| 1266 | |
| 1267 | p = *head; |
| 1268 | if (p == NULL || p->sec != sec) |
| 1269 | { |
| 1270 | bfd_size_type amt = sizeof *p; |
| 1271 | p = ((struct elf_dyn_relocs *) |
| 1272 | bfd_alloc (htab->elf.dynobj, amt)); |
| 1273 | if (p == NULL) |
| 1274 | return FALSE; |
| 1275 | p->next = *head; |
| 1276 | *head = p; |
| 1277 | p->sec = sec; |
| 1278 | p->count = 0; |
| 1279 | p->pc_count = 0; |
| 1280 | } |
| 1281 | |
| 1282 | p->count += 1; |
| 1283 | if (ELF64_R_TYPE (rel->r_info) == R_390_PC16 |
| 1284 | || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL |
| 1285 | || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL |
| 1286 | || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL |
| 1287 | || ELF64_R_TYPE (rel->r_info) == R_390_PC32 |
| 1288 | || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL |
| 1289 | || ELF64_R_TYPE (rel->r_info) == R_390_PC64) |
| 1290 | p->pc_count += 1; |
| 1291 | } |
| 1292 | break; |
| 1293 | |
| 1294 | /* This relocation describes the C++ object vtable hierarchy. |
| 1295 | Reconstruct it for later use during GC. */ |
| 1296 | case R_390_GNU_VTINHERIT: |
| 1297 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 1298 | return FALSE; |
| 1299 | break; |
| 1300 | |
| 1301 | /* This relocation describes which C++ vtable entries are actually |
| 1302 | used. Record for later use during GC. */ |
| 1303 | case R_390_GNU_VTENTRY: |
| 1304 | BFD_ASSERT (h != NULL); |
| 1305 | if (h != NULL |
| 1306 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 1307 | return FALSE; |
| 1308 | break; |
| 1309 | |
| 1310 | default: |
| 1311 | break; |
| 1312 | } |
| 1313 | } |
| 1314 | |
| 1315 | return TRUE; |
| 1316 | } |
| 1317 | |
| 1318 | /* Return the section that should be marked against GC for a given |
| 1319 | relocation. */ |
| 1320 | |
| 1321 | static asection * |
| 1322 | elf_s390_gc_mark_hook (asection *sec, |
| 1323 | struct bfd_link_info *info, |
| 1324 | Elf_Internal_Rela *rel, |
| 1325 | struct elf_link_hash_entry *h, |
| 1326 | Elf_Internal_Sym *sym) |
| 1327 | { |
| 1328 | if (h != NULL) |
| 1329 | switch (ELF64_R_TYPE (rel->r_info)) |
| 1330 | { |
| 1331 | case R_390_GNU_VTINHERIT: |
| 1332 | case R_390_GNU_VTENTRY: |
| 1333 | return NULL; |
| 1334 | } |
| 1335 | |
| 1336 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 1337 | } |
| 1338 | |
| 1339 | /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT |
| 1340 | entry but we found we will not create any. Called when we find we will |
| 1341 | not have any PLT for this symbol, by for example |
| 1342 | elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, |
| 1343 | or elf_s390_size_dynamic_sections if no dynamic sections will be |
| 1344 | created (we're only linking static objects). */ |
| 1345 | |
| 1346 | static void |
| 1347 | elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h) |
| 1348 | { |
| 1349 | if (h->elf.root.type == bfd_link_hash_warning) |
| 1350 | h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; |
| 1351 | |
| 1352 | if (h->gotplt_refcount <= 0) |
| 1353 | return; |
| 1354 | |
| 1355 | /* We simply add the number of gotplt references to the number |
| 1356 | * of got references for this symbol. */ |
| 1357 | h->elf.got.refcount += h->gotplt_refcount; |
| 1358 | h->gotplt_refcount = -1; |
| 1359 | } |
| 1360 | |
| 1361 | /* Find dynamic relocs for H that apply to read-only sections. */ |
| 1362 | |
| 1363 | static asection * |
| 1364 | readonly_dynrelocs (struct elf_link_hash_entry *h) |
| 1365 | { |
| 1366 | struct elf_dyn_relocs *p; |
| 1367 | |
| 1368 | for (p = elf_s390_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) |
| 1369 | { |
| 1370 | asection *s = p->sec->output_section; |
| 1371 | |
| 1372 | if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| 1373 | return p->sec; |
| 1374 | } |
| 1375 | return NULL; |
| 1376 | } |
| 1377 | |
| 1378 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 1379 | regular object. The current definition is in some section of the |
| 1380 | dynamic object, but we're not including those sections. We have to |
| 1381 | change the definition to something the rest of the link can |
| 1382 | understand. */ |
| 1383 | |
| 1384 | static bfd_boolean |
| 1385 | elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 1386 | struct elf_link_hash_entry *h) |
| 1387 | { |
| 1388 | struct elf_s390_link_hash_table *htab; |
| 1389 | asection *s, *srel; |
| 1390 | |
| 1391 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
| 1392 | if (s390_is_ifunc_symbol_p (h)) |
| 1393 | { |
| 1394 | /* All local STT_GNU_IFUNC references must be treated as local |
| 1395 | calls via local PLT. */ |
| 1396 | if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h)) |
| 1397 | { |
| 1398 | bfd_size_type pc_count = 0, count = 0; |
| 1399 | struct elf_dyn_relocs **pp; |
| 1400 | struct elf_s390_link_hash_entry *eh; |
| 1401 | struct elf_dyn_relocs *p; |
| 1402 | |
| 1403 | eh = (struct elf_s390_link_hash_entry *) h; |
| 1404 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
| 1405 | { |
| 1406 | pc_count += p->pc_count; |
| 1407 | p->count -= p->pc_count; |
| 1408 | p->pc_count = 0; |
| 1409 | count += p->count; |
| 1410 | if (p->count == 0) |
| 1411 | *pp = p->next; |
| 1412 | else |
| 1413 | pp = &p->next; |
| 1414 | } |
| 1415 | |
| 1416 | if (pc_count || count) |
| 1417 | { |
| 1418 | h->needs_plt = 1; |
| 1419 | h->non_got_ref = 1; |
| 1420 | if (h->plt.refcount <= 0) |
| 1421 | h->plt.refcount = 1; |
| 1422 | else |
| 1423 | h->plt.refcount += 1; |
| 1424 | } |
| 1425 | } |
| 1426 | |
| 1427 | if (h->plt.refcount <= 0) |
| 1428 | { |
| 1429 | h->plt.offset = (bfd_vma) -1; |
| 1430 | h->needs_plt = 0; |
| 1431 | } |
| 1432 | return TRUE; |
| 1433 | } |
| 1434 | |
| 1435 | /* If this is a function, put it in the procedure linkage table. We |
| 1436 | will fill in the contents of the procedure linkage table later |
| 1437 | (although we could actually do it here). */ |
| 1438 | if (h->type == STT_FUNC |
| 1439 | || h->needs_plt) |
| 1440 | { |
| 1441 | if (h->plt.refcount <= 0 |
| 1442 | || SYMBOL_CALLS_LOCAL (info, h) |
| 1443 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
| 1444 | { |
| 1445 | /* This case can occur if we saw a PLT32 reloc in an input |
| 1446 | file, but the symbol was never referred to by a dynamic |
| 1447 | object, or if all references were garbage collected. In |
| 1448 | such a case, we don't actually need to build a procedure |
| 1449 | linkage table, and we can just do a PC32 reloc instead. */ |
| 1450 | h->plt.offset = (bfd_vma) -1; |
| 1451 | h->needs_plt = 0; |
| 1452 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
| 1453 | } |
| 1454 | |
| 1455 | return TRUE; |
| 1456 | } |
| 1457 | else |
| 1458 | /* It's possible that we incorrectly decided a .plt reloc was |
| 1459 | needed for an R_390_PC32 reloc to a non-function sym in |
| 1460 | check_relocs. We can't decide accurately between function and |
| 1461 | non-function syms in check-relocs; Objects loaded later in |
| 1462 | the link may change h->type. So fix it now. */ |
| 1463 | h->plt.offset = (bfd_vma) -1; |
| 1464 | |
| 1465 | /* If this is a weak symbol, and there is a real definition, the |
| 1466 | processor independent code will have arranged for us to see the |
| 1467 | real definition first, and we can just use the same value. */ |
| 1468 | if (h->is_weakalias) |
| 1469 | { |
| 1470 | struct elf_link_hash_entry *def = weakdef (h); |
| 1471 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); |
| 1472 | h->root.u.def.section = def->root.u.def.section; |
| 1473 | h->root.u.def.value = def->root.u.def.value; |
| 1474 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
| 1475 | h->non_got_ref = def->non_got_ref; |
| 1476 | return TRUE; |
| 1477 | } |
| 1478 | |
| 1479 | /* This is a reference to a symbol defined by a dynamic object which |
| 1480 | is not a function. */ |
| 1481 | |
| 1482 | /* If we are creating a shared library, we must presume that the |
| 1483 | only references to the symbol are via the global offset table. |
| 1484 | For such cases we need not do anything here; the relocations will |
| 1485 | be handled correctly by relocate_section. */ |
| 1486 | if (bfd_link_pic (info)) |
| 1487 | return TRUE; |
| 1488 | |
| 1489 | /* If there are no references to this symbol that do not use the |
| 1490 | GOT, we don't need to generate a copy reloc. */ |
| 1491 | if (!h->non_got_ref) |
| 1492 | return TRUE; |
| 1493 | |
| 1494 | /* If -z nocopyreloc was given, we won't generate them either. */ |
| 1495 | if (info->nocopyreloc) |
| 1496 | { |
| 1497 | h->non_got_ref = 0; |
| 1498 | return TRUE; |
| 1499 | } |
| 1500 | |
| 1501 | /* If we don't find any dynamic relocs in read-only sections, then |
| 1502 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
| 1503 | if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h)) |
| 1504 | { |
| 1505 | h->non_got_ref = 0; |
| 1506 | return TRUE; |
| 1507 | } |
| 1508 | |
| 1509 | /* We must allocate the symbol in our .dynbss section, which will |
| 1510 | become part of the .bss section of the executable. There will be |
| 1511 | an entry for this symbol in the .dynsym section. The dynamic |
| 1512 | object will contain position independent code, so all references |
| 1513 | from the dynamic object to this symbol will go through the global |
| 1514 | offset table. The dynamic linker will use the .dynsym entry to |
| 1515 | determine the address it must put in the global offset table, so |
| 1516 | both the dynamic object and the regular object will refer to the |
| 1517 | same memory location for the variable. */ |
| 1518 | |
| 1519 | htab = elf_s390_hash_table (info); |
| 1520 | if (htab == NULL) |
| 1521 | return FALSE; |
| 1522 | |
| 1523 | /* We must generate a R_390_COPY reloc to tell the dynamic linker to |
| 1524 | copy the initial value out of the dynamic object and into the |
| 1525 | runtime process image. */ |
| 1526 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
| 1527 | { |
| 1528 | s = htab->elf.sdynrelro; |
| 1529 | srel = htab->elf.sreldynrelro; |
| 1530 | } |
| 1531 | else |
| 1532 | { |
| 1533 | s = htab->elf.sdynbss; |
| 1534 | srel = htab->elf.srelbss; |
| 1535 | } |
| 1536 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
| 1537 | { |
| 1538 | srel->size += sizeof (Elf64_External_Rela); |
| 1539 | h->needs_copy = 1; |
| 1540 | } |
| 1541 | |
| 1542 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
| 1543 | } |
| 1544 | |
| 1545 | /* Allocate space in .plt, .got and associated reloc sections for |
| 1546 | dynamic relocs. */ |
| 1547 | |
| 1548 | static bfd_boolean |
| 1549 | allocate_dynrelocs (struct elf_link_hash_entry *h, |
| 1550 | void * inf) |
| 1551 | { |
| 1552 | struct bfd_link_info *info; |
| 1553 | struct elf_s390_link_hash_table *htab; |
| 1554 | struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h; |
| 1555 | struct elf_dyn_relocs *p; |
| 1556 | |
| 1557 | if (h->root.type == bfd_link_hash_indirect) |
| 1558 | return TRUE; |
| 1559 | |
| 1560 | info = (struct bfd_link_info *) inf; |
| 1561 | htab = elf_s390_hash_table (info); |
| 1562 | if (htab == NULL) |
| 1563 | return FALSE; |
| 1564 | |
| 1565 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
| 1566 | here if it is defined and referenced in a non-shared object. */ |
| 1567 | if (s390_is_ifunc_symbol_p (h) && h->def_regular) |
| 1568 | return s390_elf_allocate_ifunc_dyn_relocs (info, h); |
| 1569 | else if (htab->elf.dynamic_sections_created |
| 1570 | && h->plt.refcount > 0) |
| 1571 | { |
| 1572 | /* Make sure this symbol is output as a dynamic symbol. |
| 1573 | Undefined weak syms won't yet be marked as dynamic. */ |
| 1574 | if (h->dynindx == -1 |
| 1575 | && !h->forced_local) |
| 1576 | { |
| 1577 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1578 | return FALSE; |
| 1579 | } |
| 1580 | |
| 1581 | if (bfd_link_pic (info) |
| 1582 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
| 1583 | { |
| 1584 | asection *s = htab->elf.splt; |
| 1585 | |
| 1586 | /* If this is the first .plt entry, make room for the special |
| 1587 | first entry. */ |
| 1588 | if (s->size == 0) |
| 1589 | s->size += PLT_FIRST_ENTRY_SIZE; |
| 1590 | |
| 1591 | h->plt.offset = s->size; |
| 1592 | |
| 1593 | /* If this symbol is not defined in a regular file, and we are |
| 1594 | not generating a shared library, then set the symbol to this |
| 1595 | location in the .plt. This is required to make function |
| 1596 | pointers compare as equal between the normal executable and |
| 1597 | the shared library. */ |
| 1598 | if (! bfd_link_pic (info) |
| 1599 | && !h->def_regular) |
| 1600 | { |
| 1601 | h->root.u.def.section = s; |
| 1602 | h->root.u.def.value = h->plt.offset; |
| 1603 | } |
| 1604 | |
| 1605 | /* Make room for this entry. */ |
| 1606 | s->size += PLT_ENTRY_SIZE; |
| 1607 | |
| 1608 | /* We also need to make an entry in the .got.plt section. */ |
| 1609 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; |
| 1610 | |
| 1611 | /* We also need to make an entry in the .rela.plt section. */ |
| 1612 | htab->elf.srelplt->size += sizeof (Elf64_External_Rela); |
| 1613 | } |
| 1614 | else |
| 1615 | { |
| 1616 | h->plt.offset = (bfd_vma) -1; |
| 1617 | h->needs_plt = 0; |
| 1618 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
| 1619 | } |
| 1620 | } |
| 1621 | else |
| 1622 | { |
| 1623 | h->plt.offset = (bfd_vma) -1; |
| 1624 | h->needs_plt = 0; |
| 1625 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
| 1626 | } |
| 1627 | |
| 1628 | /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to |
| 1629 | the binary, we can optimize a bit. IE64 and GOTIE64 get converted |
| 1630 | to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT |
| 1631 | we can save the dynamic TLS relocation. */ |
| 1632 | if (h->got.refcount > 0 |
| 1633 | && !bfd_link_pic (info) |
| 1634 | && h->dynindx == -1 |
| 1635 | && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) |
| 1636 | { |
| 1637 | if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) |
| 1638 | /* For the GOTIE access without a literal pool entry the offset has |
| 1639 | to be stored somewhere. The immediate value in the instruction |
| 1640 | is not bit enough so the value is stored in the got. */ |
| 1641 | { |
| 1642 | h->got.offset = htab->elf.sgot->size; |
| 1643 | htab->elf.sgot->size += GOT_ENTRY_SIZE; |
| 1644 | } |
| 1645 | else |
| 1646 | h->got.offset = (bfd_vma) -1; |
| 1647 | } |
| 1648 | else if (h->got.refcount > 0) |
| 1649 | { |
| 1650 | asection *s; |
| 1651 | bfd_boolean dyn; |
| 1652 | int tls_type = elf_s390_hash_entry(h)->tls_type; |
| 1653 | |
| 1654 | /* Make sure this symbol is output as a dynamic symbol. |
| 1655 | Undefined weak syms won't yet be marked as dynamic. */ |
| 1656 | if (h->dynindx == -1 |
| 1657 | && !h->forced_local) |
| 1658 | { |
| 1659 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1660 | return FALSE; |
| 1661 | } |
| 1662 | |
| 1663 | s = htab->elf.sgot; |
| 1664 | h->got.offset = s->size; |
| 1665 | s->size += GOT_ENTRY_SIZE; |
| 1666 | /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */ |
| 1667 | if (tls_type == GOT_TLS_GD) |
| 1668 | s->size += GOT_ENTRY_SIZE; |
| 1669 | dyn = htab->elf.dynamic_sections_created; |
| 1670 | /* R_390_TLS_IE64 needs one dynamic relocation, |
| 1671 | R_390_TLS_GD64 needs one if local symbol and two if global. */ |
| 1672 | if ((tls_type == GOT_TLS_GD && h->dynindx == -1) |
| 1673 | || tls_type >= GOT_TLS_IE) |
| 1674 | htab->elf.srelgot->size += sizeof (Elf64_External_Rela); |
| 1675 | else if (tls_type == GOT_TLS_GD) |
| 1676 | htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela); |
| 1677 | else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h) |
| 1678 | && (bfd_link_pic (info) |
| 1679 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
| 1680 | htab->elf.srelgot->size += sizeof (Elf64_External_Rela); |
| 1681 | } |
| 1682 | else |
| 1683 | h->got.offset = (bfd_vma) -1; |
| 1684 | |
| 1685 | if (eh->dyn_relocs == NULL) |
| 1686 | return TRUE; |
| 1687 | |
| 1688 | /* In the shared -Bsymbolic case, discard space allocated for |
| 1689 | dynamic pc-relative relocs against symbols which turn out to be |
| 1690 | defined in regular objects. For the normal shared case, discard |
| 1691 | space for pc-relative relocs that have become local due to symbol |
| 1692 | visibility changes. */ |
| 1693 | |
| 1694 | if (bfd_link_pic (info)) |
| 1695 | { |
| 1696 | if (SYMBOL_CALLS_LOCAL (info, h)) |
| 1697 | { |
| 1698 | struct elf_dyn_relocs **pp; |
| 1699 | |
| 1700 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
| 1701 | { |
| 1702 | p->count -= p->pc_count; |
| 1703 | p->pc_count = 0; |
| 1704 | if (p->count == 0) |
| 1705 | *pp = p->next; |
| 1706 | else |
| 1707 | pp = &p->next; |
| 1708 | } |
| 1709 | } |
| 1710 | |
| 1711 | /* Also discard relocs on undefined weak syms with non-default |
| 1712 | visibility. */ |
| 1713 | if (eh->dyn_relocs != NULL |
| 1714 | && h->root.type == bfd_link_hash_undefweak) |
| 1715 | { |
| 1716 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 1717 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
| 1718 | eh->dyn_relocs = NULL; |
| 1719 | |
| 1720 | /* Make sure undefined weak symbols are output as a dynamic |
| 1721 | symbol in PIEs. */ |
| 1722 | else if (h->dynindx == -1 |
| 1723 | && !h->forced_local) |
| 1724 | { |
| 1725 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1726 | return FALSE; |
| 1727 | } |
| 1728 | } |
| 1729 | } |
| 1730 | else if (ELIMINATE_COPY_RELOCS) |
| 1731 | { |
| 1732 | /* For the non-shared case, discard space for relocs against |
| 1733 | symbols which turn out to need copy relocs or are not |
| 1734 | dynamic. */ |
| 1735 | |
| 1736 | if (!h->non_got_ref |
| 1737 | && ((h->def_dynamic |
| 1738 | && !h->def_regular) |
| 1739 | || (htab->elf.dynamic_sections_created |
| 1740 | && (h->root.type == bfd_link_hash_undefweak |
| 1741 | || h->root.type == bfd_link_hash_undefined)))) |
| 1742 | { |
| 1743 | /* Make sure this symbol is output as a dynamic symbol. |
| 1744 | Undefined weak syms won't yet be marked as dynamic. */ |
| 1745 | if (h->dynindx == -1 |
| 1746 | && !h->forced_local) |
| 1747 | { |
| 1748 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1749 | return FALSE; |
| 1750 | } |
| 1751 | |
| 1752 | /* If that succeeded, we know we'll be keeping all the |
| 1753 | relocs. */ |
| 1754 | if (h->dynindx != -1) |
| 1755 | goto keep; |
| 1756 | } |
| 1757 | |
| 1758 | eh->dyn_relocs = NULL; |
| 1759 | |
| 1760 | keep: ; |
| 1761 | } |
| 1762 | |
| 1763 | /* Finally, allocate space. */ |
| 1764 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 1765 | { |
| 1766 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
| 1767 | sreloc->size += p->count * sizeof (Elf64_External_Rela); |
| 1768 | } |
| 1769 | |
| 1770 | return TRUE; |
| 1771 | } |
| 1772 | |
| 1773 | /* Set DF_TEXTREL if we find any dynamic relocs that apply to |
| 1774 | read-only sections. */ |
| 1775 | |
| 1776 | static bfd_boolean |
| 1777 | maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p) |
| 1778 | { |
| 1779 | asection *sec; |
| 1780 | |
| 1781 | if (h->root.type == bfd_link_hash_indirect) |
| 1782 | return TRUE; |
| 1783 | |
| 1784 | sec = readonly_dynrelocs (h); |
| 1785 | if (sec != NULL) |
| 1786 | { |
| 1787 | struct bfd_link_info *info = (struct bfd_link_info *) info_p; |
| 1788 | |
| 1789 | info->flags |= DF_TEXTREL; |
| 1790 | info->callbacks->minfo |
| 1791 | (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"), |
| 1792 | sec->owner, h->root.root.string, sec); |
| 1793 | |
| 1794 | /* Not an error, just cut short the traversal. */ |
| 1795 | return FALSE; |
| 1796 | } |
| 1797 | return TRUE; |
| 1798 | } |
| 1799 | |
| 1800 | /* Set the sizes of the dynamic sections. */ |
| 1801 | |
| 1802 | static bfd_boolean |
| 1803 | elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 1804 | struct bfd_link_info *info) |
| 1805 | { |
| 1806 | struct elf_s390_link_hash_table *htab; |
| 1807 | bfd *dynobj; |
| 1808 | asection *s; |
| 1809 | bfd_boolean relocs; |
| 1810 | bfd *ibfd; |
| 1811 | |
| 1812 | htab = elf_s390_hash_table (info); |
| 1813 | if (htab == NULL) |
| 1814 | return FALSE; |
| 1815 | |
| 1816 | dynobj = htab->elf.dynobj; |
| 1817 | if (dynobj == NULL) |
| 1818 | abort (); |
| 1819 | |
| 1820 | if (htab->elf.dynamic_sections_created) |
| 1821 | { |
| 1822 | /* Set the contents of the .interp section to the interpreter. */ |
| 1823 | if (bfd_link_executable (info) && !info->nointerp) |
| 1824 | { |
| 1825 | s = bfd_get_linker_section (dynobj, ".interp"); |
| 1826 | if (s == NULL) |
| 1827 | abort (); |
| 1828 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 1829 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 1830 | } |
| 1831 | } |
| 1832 | |
| 1833 | if (htab->elf.sgot && s390_gotplt_after_got_p (info)) |
| 1834 | { |
| 1835 | /* _bfd_elf_create_got_section adds the got header size always |
| 1836 | to .got.plt but we need it in .got if this section comes |
| 1837 | first. */ |
| 1838 | htab->elf.sgot->size += 3 * GOT_ENTRY_SIZE; |
| 1839 | htab->elf.sgotplt->size -= 3 * GOT_ENTRY_SIZE; |
| 1840 | |
| 1841 | /* Make the _GLOBAL_OFFSET_TABLE_ symbol point to the .got |
| 1842 | instead of .got.plt. */ |
| 1843 | htab->elf.hgot->root.u.def.section = htab->elf.sgot; |
| 1844 | htab->elf.hgot->root.u.def.value = 0; |
| 1845 | } |
| 1846 | |
| 1847 | /* Set up .got offsets for local syms, and space for local dynamic |
| 1848 | relocs. */ |
| 1849 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 1850 | { |
| 1851 | bfd_signed_vma *local_got; |
| 1852 | bfd_signed_vma *end_local_got; |
| 1853 | char *local_tls_type; |
| 1854 | bfd_size_type locsymcount; |
| 1855 | Elf_Internal_Shdr *symtab_hdr; |
| 1856 | asection *srela; |
| 1857 | struct plt_entry *local_plt; |
| 1858 | unsigned int i; |
| 1859 | |
| 1860 | if (! is_s390_elf (ibfd)) |
| 1861 | continue; |
| 1862 | |
| 1863 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 1864 | { |
| 1865 | struct elf_dyn_relocs *p; |
| 1866 | |
| 1867 | for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) |
| 1868 | { |
| 1869 | if (!bfd_is_abs_section (p->sec) |
| 1870 | && bfd_is_abs_section (p->sec->output_section)) |
| 1871 | { |
| 1872 | /* Input section has been discarded, either because |
| 1873 | it is a copy of a linkonce section or due to |
| 1874 | linker script /DISCARD/, so we'll be discarding |
| 1875 | the relocs too. */ |
| 1876 | } |
| 1877 | else if (p->count != 0) |
| 1878 | { |
| 1879 | srela = elf_section_data (p->sec)->sreloc; |
| 1880 | srela->size += p->count * sizeof (Elf64_External_Rela); |
| 1881 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
| 1882 | info->flags |= DF_TEXTREL; |
| 1883 | } |
| 1884 | } |
| 1885 | } |
| 1886 | |
| 1887 | local_got = elf_local_got_refcounts (ibfd); |
| 1888 | if (!local_got) |
| 1889 | continue; |
| 1890 | |
| 1891 | symtab_hdr = &elf_symtab_hdr (ibfd); |
| 1892 | locsymcount = symtab_hdr->sh_info; |
| 1893 | end_local_got = local_got + locsymcount; |
| 1894 | local_tls_type = elf_s390_local_got_tls_type (ibfd); |
| 1895 | s = htab->elf.sgot; |
| 1896 | srela = htab->elf.srelgot; |
| 1897 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
| 1898 | { |
| 1899 | if (*local_got > 0) |
| 1900 | { |
| 1901 | *local_got = s->size; |
| 1902 | s->size += GOT_ENTRY_SIZE; |
| 1903 | if (*local_tls_type == GOT_TLS_GD) |
| 1904 | s->size += GOT_ENTRY_SIZE; |
| 1905 | if (bfd_link_pic (info)) |
| 1906 | srela->size += sizeof (Elf64_External_Rela); |
| 1907 | } |
| 1908 | else |
| 1909 | *local_got = (bfd_vma) -1; |
| 1910 | } |
| 1911 | |
| 1912 | local_plt = elf_s390_local_plt (ibfd); |
| 1913 | for (i = 0; i < symtab_hdr->sh_info; i++) |
| 1914 | { |
| 1915 | if (local_plt[i].plt.refcount > 0) |
| 1916 | { |
| 1917 | local_plt[i].plt.offset = htab->elf.iplt->size; |
| 1918 | htab->elf.iplt->size += PLT_ENTRY_SIZE; |
| 1919 | htab->elf.igotplt->size += GOT_ENTRY_SIZE; |
| 1920 | htab->elf.irelplt->size += sizeof (Elf64_External_Rela); |
| 1921 | } |
| 1922 | else |
| 1923 | local_plt[i].plt.offset = (bfd_vma) -1; |
| 1924 | } |
| 1925 | } |
| 1926 | |
| 1927 | if (htab->tls_ldm_got.refcount > 0) |
| 1928 | { |
| 1929 | /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64 |
| 1930 | relocs. */ |
| 1931 | htab->tls_ldm_got.offset = htab->elf.sgot->size; |
| 1932 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; |
| 1933 | htab->elf.srelgot->size += sizeof (Elf64_External_Rela); |
| 1934 | } |
| 1935 | else |
| 1936 | htab->tls_ldm_got.offset = -1; |
| 1937 | |
| 1938 | /* Allocate global sym .plt and .got entries, and space for global |
| 1939 | sym dynamic relocs. */ |
| 1940 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); |
| 1941 | |
| 1942 | /* We now have determined the sizes of the various dynamic sections. |
| 1943 | Allocate memory for them. */ |
| 1944 | relocs = FALSE; |
| 1945 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 1946 | { |
| 1947 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 1948 | continue; |
| 1949 | |
| 1950 | if (s == htab->elf.splt |
| 1951 | || s == htab->elf.sgot |
| 1952 | || s == htab->elf.sgotplt |
| 1953 | || s == htab->elf.sdynbss |
| 1954 | || s == htab->elf.sdynrelro |
| 1955 | || s == htab->elf.iplt |
| 1956 | || s == htab->elf.igotplt |
| 1957 | || s == htab->irelifunc) |
| 1958 | { |
| 1959 | /* Strip this section if we don't need it; see the |
| 1960 | comment below. */ |
| 1961 | } |
| 1962 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
| 1963 | { |
| 1964 | if (s->size != 0 && s != htab->elf.srelplt) |
| 1965 | relocs = TRUE; |
| 1966 | |
| 1967 | /* We use the reloc_count field as a counter if we need |
| 1968 | to copy relocs into the output file. */ |
| 1969 | s->reloc_count = 0; |
| 1970 | } |
| 1971 | else |
| 1972 | { |
| 1973 | /* It's not one of our sections, so don't allocate space. */ |
| 1974 | continue; |
| 1975 | } |
| 1976 | |
| 1977 | if (s->size == 0) |
| 1978 | { |
| 1979 | /* If we don't need this section, strip it from the |
| 1980 | output file. This is to handle .rela.bss and |
| 1981 | .rela.plt. We must create it in |
| 1982 | create_dynamic_sections, because it must be created |
| 1983 | before the linker maps input sections to output |
| 1984 | sections. The linker does that before |
| 1985 | adjust_dynamic_symbol is called, and it is that |
| 1986 | function which decides whether anything needs to go |
| 1987 | into these sections. */ |
| 1988 | |
| 1989 | s->flags |= SEC_EXCLUDE; |
| 1990 | continue; |
| 1991 | } |
| 1992 | |
| 1993 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 1994 | continue; |
| 1995 | |
| 1996 | /* Allocate memory for the section contents. We use bfd_zalloc |
| 1997 | here in case unused entries are not reclaimed before the |
| 1998 | section's contents are written out. This should not happen, |
| 1999 | but this way if it does, we get a R_390_NONE reloc instead |
| 2000 | of garbage. */ |
| 2001 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
| 2002 | if (s->contents == NULL) |
| 2003 | return FALSE; |
| 2004 | } |
| 2005 | |
| 2006 | if (htab->elf.dynamic_sections_created) |
| 2007 | { |
| 2008 | /* Add some entries to the .dynamic section. We fill in the |
| 2009 | values later, in elf_s390_finish_dynamic_sections, but we |
| 2010 | must add the entries now so that we get the correct size for |
| 2011 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 2012 | dynamic linker and used by the debugger. */ |
| 2013 | #define add_dynamic_entry(TAG, VAL) \ |
| 2014 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 2015 | |
| 2016 | if (bfd_link_executable (info)) |
| 2017 | { |
| 2018 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 2019 | return FALSE; |
| 2020 | } |
| 2021 | |
| 2022 | if (htab->elf.splt->size != 0) |
| 2023 | { |
| 2024 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
| 2025 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 2026 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 2027 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 2028 | return FALSE; |
| 2029 | } |
| 2030 | |
| 2031 | if (relocs) |
| 2032 | { |
| 2033 | if (!add_dynamic_entry (DT_RELA, 0) |
| 2034 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 2035 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) |
| 2036 | return FALSE; |
| 2037 | |
| 2038 | /* If any dynamic relocs apply to a read-only section, |
| 2039 | then we need a DT_TEXTREL entry. */ |
| 2040 | if ((info->flags & DF_TEXTREL) == 0) |
| 2041 | elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info); |
| 2042 | |
| 2043 | if ((info->flags & DF_TEXTREL) != 0) |
| 2044 | { |
| 2045 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 2046 | return FALSE; |
| 2047 | } |
| 2048 | } |
| 2049 | } |
| 2050 | #undef add_dynamic_entry |
| 2051 | |
| 2052 | return TRUE; |
| 2053 | } |
| 2054 | |
| 2055 | /* Return the base VMA address which should be subtracted from real addresses |
| 2056 | when resolving @dtpoff relocation. |
| 2057 | This is PT_TLS segment p_vaddr. */ |
| 2058 | |
| 2059 | static bfd_vma |
| 2060 | dtpoff_base (struct bfd_link_info *info) |
| 2061 | { |
| 2062 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 2063 | if (elf_hash_table (info)->tls_sec == NULL) |
| 2064 | return 0; |
| 2065 | return elf_hash_table (info)->tls_sec->vma; |
| 2066 | } |
| 2067 | |
| 2068 | /* Return the relocation value for @tpoff relocation |
| 2069 | if STT_TLS virtual address is ADDRESS. */ |
| 2070 | |
| 2071 | static bfd_vma |
| 2072 | tpoff (struct bfd_link_info *info, bfd_vma address) |
| 2073 | { |
| 2074 | struct elf_link_hash_table *htab = elf_hash_table (info); |
| 2075 | |
| 2076 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 2077 | if (htab->tls_sec == NULL) |
| 2078 | return 0; |
| 2079 | return htab->tls_size + htab->tls_sec->vma - address; |
| 2080 | } |
| 2081 | |
| 2082 | /* Complain if TLS instruction relocation is against an invalid |
| 2083 | instruction. */ |
| 2084 | |
| 2085 | static void |
| 2086 | invalid_tls_insn (bfd *input_bfd, |
| 2087 | asection *input_section, |
| 2088 | Elf_Internal_Rela *rel) |
| 2089 | { |
| 2090 | reloc_howto_type *howto; |
| 2091 | |
| 2092 | howto = elf_howto_table + ELF64_R_TYPE (rel->r_info); |
| 2093 | _bfd_error_handler |
| 2094 | /* xgettext:c-format */ |
| 2095 | (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"), |
| 2096 | input_bfd, |
| 2097 | input_section, |
| 2098 | (uint64_t) rel->r_offset, |
| 2099 | howto->name); |
| 2100 | bfd_set_error (bfd_error_bad_value); |
| 2101 | } |
| 2102 | |
| 2103 | /* Relocate a 390 ELF section. */ |
| 2104 | |
| 2105 | static bfd_boolean |
| 2106 | elf_s390_relocate_section (bfd *output_bfd, |
| 2107 | struct bfd_link_info *info, |
| 2108 | bfd *input_bfd, |
| 2109 | asection *input_section, |
| 2110 | bfd_byte *contents, |
| 2111 | Elf_Internal_Rela *relocs, |
| 2112 | Elf_Internal_Sym *local_syms, |
| 2113 | asection **local_sections) |
| 2114 | { |
| 2115 | struct elf_s390_link_hash_table *htab; |
| 2116 | Elf_Internal_Shdr *symtab_hdr; |
| 2117 | struct elf_link_hash_entry **sym_hashes; |
| 2118 | bfd_vma *local_got_offsets; |
| 2119 | Elf_Internal_Rela *rel; |
| 2120 | Elf_Internal_Rela *relend; |
| 2121 | |
| 2122 | BFD_ASSERT (is_s390_elf (input_bfd)); |
| 2123 | |
| 2124 | htab = elf_s390_hash_table (info); |
| 2125 | if (htab == NULL) |
| 2126 | return FALSE; |
| 2127 | |
| 2128 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
| 2129 | sym_hashes = elf_sym_hashes (input_bfd); |
| 2130 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 2131 | |
| 2132 | rel = relocs; |
| 2133 | relend = relocs + input_section->reloc_count; |
| 2134 | for (; rel < relend; rel++) |
| 2135 | { |
| 2136 | unsigned int r_type; |
| 2137 | reloc_howto_type *howto; |
| 2138 | unsigned long r_symndx; |
| 2139 | struct elf_link_hash_entry *h; |
| 2140 | Elf_Internal_Sym *sym; |
| 2141 | asection *sec; |
| 2142 | bfd_vma off; |
| 2143 | bfd_vma relocation; |
| 2144 | bfd_boolean unresolved_reloc; |
| 2145 | bfd_reloc_status_type r; |
| 2146 | int tls_type; |
| 2147 | bfd_boolean resolved_to_zero; |
| 2148 | |
| 2149 | r_type = ELF64_R_TYPE (rel->r_info); |
| 2150 | if (r_type == (int) R_390_GNU_VTINHERIT |
| 2151 | || r_type == (int) R_390_GNU_VTENTRY) |
| 2152 | continue; |
| 2153 | if (r_type >= (int) R_390_max) |
| 2154 | { |
| 2155 | bfd_set_error (bfd_error_bad_value); |
| 2156 | return FALSE; |
| 2157 | } |
| 2158 | |
| 2159 | howto = elf_howto_table + r_type; |
| 2160 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 2161 | |
| 2162 | h = NULL; |
| 2163 | sym = NULL; |
| 2164 | sec = NULL; |
| 2165 | unresolved_reloc = FALSE; |
| 2166 | if (r_symndx < symtab_hdr->sh_info) |
| 2167 | { |
| 2168 | sym = local_syms + r_symndx; |
| 2169 | sec = local_sections[r_symndx]; |
| 2170 | |
| 2171 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
| 2172 | { |
| 2173 | struct plt_entry *local_plt = elf_s390_local_plt (input_bfd); |
| 2174 | if (local_plt == NULL) |
| 2175 | return FALSE; |
| 2176 | |
| 2177 | /* Address of the PLT slot. */ |
| 2178 | relocation = (htab->elf.iplt->output_section->vma |
| 2179 | + htab->elf.iplt->output_offset |
| 2180 | + local_plt[r_symndx].plt.offset); |
| 2181 | |
| 2182 | switch (r_type) |
| 2183 | { |
| 2184 | case R_390_PLTOFF16: |
| 2185 | case R_390_PLTOFF32: |
| 2186 | case R_390_PLTOFF64: |
| 2187 | relocation -= s390_got_pointer (info); |
| 2188 | break; |
| 2189 | case R_390_GOTPLT12: |
| 2190 | case R_390_GOTPLT16: |
| 2191 | case R_390_GOTPLT20: |
| 2192 | case R_390_GOTPLT32: |
| 2193 | case R_390_GOTPLT64: |
| 2194 | case R_390_GOTPLTENT: |
| 2195 | case R_390_GOT12: |
| 2196 | case R_390_GOT16: |
| 2197 | case R_390_GOT20: |
| 2198 | case R_390_GOT32: |
| 2199 | case R_390_GOT64: |
| 2200 | case R_390_GOTENT: |
| 2201 | { |
| 2202 | /* Write the PLT slot address into the GOT slot. */ |
| 2203 | bfd_put_64 (output_bfd, relocation, |
| 2204 | htab->elf.sgot->contents + |
| 2205 | local_got_offsets[r_symndx]); |
| 2206 | relocation = (local_got_offsets[r_symndx] + |
| 2207 | s390_got_offset (info)); |
| 2208 | |
| 2209 | if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT) |
| 2210 | relocation += s390_got_pointer (info); |
| 2211 | break; |
| 2212 | } |
| 2213 | default: |
| 2214 | break; |
| 2215 | } |
| 2216 | /* The output section is needed later in |
| 2217 | finish_dynamic_section when creating the dynamic |
| 2218 | relocation. */ |
| 2219 | local_plt[r_symndx].sec = sec; |
| 2220 | goto do_relocation; |
| 2221 | } |
| 2222 | else |
| 2223 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 2224 | } |
| 2225 | else |
| 2226 | { |
| 2227 | bfd_boolean warned ATTRIBUTE_UNUSED; |
| 2228 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
| 2229 | |
| 2230 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 2231 | r_symndx, symtab_hdr, sym_hashes, |
| 2232 | h, sec, relocation, |
| 2233 | unresolved_reloc, warned, ignored); |
| 2234 | } |
| 2235 | |
| 2236 | if (sec != NULL && discarded_section (sec)) |
| 2237 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 2238 | rel, 1, relend, howto, 0, contents); |
| 2239 | |
| 2240 | if (bfd_link_relocatable (info)) |
| 2241 | continue; |
| 2242 | |
| 2243 | resolved_to_zero = (h != NULL |
| 2244 | && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); |
| 2245 | |
| 2246 | switch (r_type) |
| 2247 | { |
| 2248 | case R_390_GOTPLT12: |
| 2249 | case R_390_GOTPLT16: |
| 2250 | case R_390_GOTPLT20: |
| 2251 | case R_390_GOTPLT32: |
| 2252 | case R_390_GOTPLT64: |
| 2253 | case R_390_GOTPLTENT: |
| 2254 | /* There are three cases for a GOTPLT relocation. 1) The |
| 2255 | relocation is against the jump slot entry of a plt that |
| 2256 | will get emitted to the output file. 2) The relocation |
| 2257 | is against the jump slot of a plt entry that has been |
| 2258 | removed. elf_s390_adjust_gotplt has created a GOT entry |
| 2259 | as replacement. 3) The relocation is against a local symbol. |
| 2260 | Cases 2) and 3) are the same as the GOT relocation code |
| 2261 | so we just have to test for case 1 and fall through for |
| 2262 | the other two. */ |
| 2263 | if (h != NULL && h->plt.offset != (bfd_vma) -1) |
| 2264 | { |
| 2265 | bfd_vma plt_index; |
| 2266 | |
| 2267 | if (s390_is_ifunc_symbol_p (h)) |
| 2268 | { |
| 2269 | /* Entry indices of .iplt and .igot.plt match |
| 2270 | 1:1. No magic PLT first entry here. */ |
| 2271 | plt_index = h->plt.offset / PLT_ENTRY_SIZE; |
| 2272 | relocation = (plt_index * GOT_ENTRY_SIZE |
| 2273 | + s390_gotplt_offset (info) |
| 2274 | + htab->elf.igotplt->output_offset); |
| 2275 | } |
| 2276 | else |
| 2277 | { |
| 2278 | plt_index = ((h->plt.offset - PLT_FIRST_ENTRY_SIZE) |
| 2279 | / PLT_ENTRY_SIZE); |
| 2280 | |
| 2281 | relocation = (plt_index * GOT_ENTRY_SIZE |
| 2282 | + s390_gotplt_offset (info)); |
| 2283 | } |
| 2284 | if (r_type == R_390_GOTPLTENT) |
| 2285 | relocation += s390_got_pointer (info); |
| 2286 | unresolved_reloc = FALSE; |
| 2287 | break; |
| 2288 | } |
| 2289 | /* Fall through. */ |
| 2290 | |
| 2291 | case R_390_GOT12: |
| 2292 | case R_390_GOT16: |
| 2293 | case R_390_GOT20: |
| 2294 | case R_390_GOT32: |
| 2295 | case R_390_GOT64: |
| 2296 | case R_390_GOTENT: |
| 2297 | /* Relocation is to the entry for this symbol in the global |
| 2298 | offset table. */ |
| 2299 | if (htab->elf.sgot == NULL) |
| 2300 | abort (); |
| 2301 | |
| 2302 | if (h != NULL) |
| 2303 | { |
| 2304 | bfd_boolean dyn; |
| 2305 | |
| 2306 | off = h->got.offset; |
| 2307 | dyn = htab->elf.dynamic_sections_created; |
| 2308 | |
| 2309 | if (s390_is_ifunc_symbol_p (h)) |
| 2310 | { |
| 2311 | BFD_ASSERT (h->plt.offset != (bfd_vma) -1); |
| 2312 | if (off == (bfd_vma)-1) |
| 2313 | { |
| 2314 | /* No explicit GOT usage so redirect to the |
| 2315 | got.iplt slot. */ |
| 2316 | relocation = (s390_gotplt_offset (info) |
| 2317 | + htab->elf.igotplt->output_offset |
| 2318 | + (h->plt.offset / PLT_ENTRY_SIZE |
| 2319 | * GOT_ENTRY_SIZE)); |
| 2320 | |
| 2321 | /* For @GOTENT the relocation is against the offset between |
| 2322 | the instruction and the symbols entry in the GOT and not |
| 2323 | between the start of the GOT and the symbols entry. We |
| 2324 | add the vma of the GOT to get the correct value. */ |
| 2325 | if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT) |
| 2326 | relocation += s390_got_pointer (info); |
| 2327 | |
| 2328 | break; |
| 2329 | } |
| 2330 | else |
| 2331 | { |
| 2332 | /* Explicit GOT slots must contain the address |
| 2333 | of the PLT slot. This will be handled in |
| 2334 | finish_dynamic_symbol. */ |
| 2335 | } |
| 2336 | } |
| 2337 | else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
| 2338 | bfd_link_pic (info), |
| 2339 | h) |
| 2340 | || (bfd_link_pic (info) |
| 2341 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 2342 | || resolved_to_zero) |
| 2343 | { |
| 2344 | Elf_Internal_Sym *isym; |
| 2345 | asection *sym_sec; |
| 2346 | |
| 2347 | /* This is actually a static link, or it is a |
| 2348 | -Bsymbolic link and the symbol is defined |
| 2349 | locally, or the symbol was forced to be local |
| 2350 | because of a version file. We must initialize |
| 2351 | this entry in the global offset table. Since the |
| 2352 | offset must always be a multiple of 2, we use the |
| 2353 | least significant bit to record whether we have |
| 2354 | initialized it already. |
| 2355 | |
| 2356 | When doing a dynamic link, we create a .rel.got |
| 2357 | relocation entry to initialize the value. This |
| 2358 | is done in the finish_dynamic_symbol routine. */ |
| 2359 | if ((off & 1) != 0) |
| 2360 | off &= ~1; |
| 2361 | else |
| 2362 | { |
| 2363 | bfd_put_64 (output_bfd, relocation, |
| 2364 | htab->elf.sgot->contents + off); |
| 2365 | h->got.offset |= 1; |
| 2366 | } |
| 2367 | |
| 2368 | /* When turning a GOT slot dereference into a direct |
| 2369 | reference using larl we have to make sure that |
| 2370 | the symbol is 1. properly aligned and 2. it is no |
| 2371 | ABS symbol or will become one. */ |
| 2372 | if ((h->def_regular |
| 2373 | && bfd_link_pic (info) |
| 2374 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 2375 | /* lgrl rx,sym@GOTENT -> larl rx, sym */ |
| 2376 | && ((r_type == R_390_GOTENT |
| 2377 | && (bfd_get_16 (input_bfd, |
| 2378 | contents + rel->r_offset - 2) |
| 2379 | & 0xff0f) == 0xc408) |
| 2380 | /* lg rx, sym@GOT(r12) -> larl rx, sym */ |
| 2381 | || (r_type == R_390_GOT20 |
| 2382 | && (bfd_get_32 (input_bfd, |
| 2383 | contents + rel->r_offset - 2) |
| 2384 | & 0xff00f000) == 0xe300c000 |
| 2385 | && bfd_get_8 (input_bfd, |
| 2386 | contents + rel->r_offset + 3) == 0x04)) |
| 2387 | && (isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 2388 | input_bfd, r_symndx)) |
| 2389 | && isym->st_shndx != SHN_ABS |
| 2390 | && h != htab->elf.hdynamic |
| 2391 | && h != htab->elf.hgot |
| 2392 | && h != htab->elf.hplt |
| 2393 | && !(isym->st_value & 1) |
| 2394 | && (sym_sec = bfd_section_from_elf_index (input_bfd, |
| 2395 | isym->st_shndx)) |
| 2396 | && sym_sec->alignment_power) |
| 2397 | { |
| 2398 | unsigned short new_insn = |
| 2399 | (0xc000 | (bfd_get_8 (input_bfd, |
| 2400 | contents + rel->r_offset - 1) & 0xf0)); |
| 2401 | bfd_put_16 (output_bfd, new_insn, |
| 2402 | contents + rel->r_offset - 2); |
| 2403 | r_type = R_390_PC32DBL; |
| 2404 | rel->r_addend = 2; |
| 2405 | howto = elf_howto_table + r_type; |
| 2406 | relocation = h->root.u.def.value |
| 2407 | + h->root.u.def.section->output_section->vma |
| 2408 | + h->root.u.def.section->output_offset; |
| 2409 | goto do_relocation; |
| 2410 | } |
| 2411 | } |
| 2412 | else |
| 2413 | unresolved_reloc = FALSE; |
| 2414 | } |
| 2415 | else |
| 2416 | { |
| 2417 | if (local_got_offsets == NULL) |
| 2418 | abort (); |
| 2419 | |
| 2420 | off = local_got_offsets[r_symndx]; |
| 2421 | |
| 2422 | /* The offset must always be a multiple of 8. We use |
| 2423 | the least significant bit to record whether we have |
| 2424 | already generated the necessary reloc. */ |
| 2425 | if ((off & 1) != 0) |
| 2426 | off &= ~1; |
| 2427 | else |
| 2428 | { |
| 2429 | bfd_put_64 (output_bfd, relocation, |
| 2430 | htab->elf.sgot->contents + off); |
| 2431 | |
| 2432 | if (bfd_link_pic (info)) |
| 2433 | { |
| 2434 | asection *s; |
| 2435 | Elf_Internal_Rela outrel; |
| 2436 | bfd_byte *loc; |
| 2437 | |
| 2438 | s = htab->elf.srelgot; |
| 2439 | if (s == NULL) |
| 2440 | abort (); |
| 2441 | |
| 2442 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
| 2443 | + htab->elf.sgot->output_offset |
| 2444 | + off); |
| 2445 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); |
| 2446 | outrel.r_addend = relocation; |
| 2447 | loc = s->contents; |
| 2448 | loc += s->reloc_count++ * sizeof (Elf64_External_Rela); |
| 2449 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| 2450 | } |
| 2451 | |
| 2452 | local_got_offsets[r_symndx] |= 1; |
| 2453 | } |
| 2454 | } |
| 2455 | |
| 2456 | if (off >= (bfd_vma) -2) |
| 2457 | abort (); |
| 2458 | |
| 2459 | relocation = s390_got_offset (info) + off; |
| 2460 | |
| 2461 | /* For @GOTENT the relocation is against the offset between |
| 2462 | the instruction and the symbols entry in the GOT and not |
| 2463 | between the start of the GOT and the symbols entry. We |
| 2464 | add the vma of the GOT to get the correct value. */ |
| 2465 | if ( r_type == R_390_GOTENT |
| 2466 | || r_type == R_390_GOTPLTENT) |
| 2467 | relocation += s390_got_pointer (info); |
| 2468 | |
| 2469 | break; |
| 2470 | |
| 2471 | case R_390_GOTOFF16: |
| 2472 | case R_390_GOTOFF32: |
| 2473 | case R_390_GOTOFF64: |
| 2474 | /* Relocation is relative to the start of the global offset |
| 2475 | table. */ |
| 2476 | |
| 2477 | if (h != NULL |
| 2478 | && s390_is_ifunc_symbol_p (h) |
| 2479 | && h->def_regular |
| 2480 | && !bfd_link_executable (info)) |
| 2481 | { |
| 2482 | relocation = (htab->elf.iplt->output_section->vma |
| 2483 | + htab->elf.iplt->output_offset |
| 2484 | + h->plt.offset |
| 2485 | - s390_got_pointer (info)); |
| 2486 | goto do_relocation; |
| 2487 | } |
| 2488 | |
| 2489 | relocation -= s390_got_pointer (info); |
| 2490 | break; |
| 2491 | |
| 2492 | case R_390_GOTPC: |
| 2493 | case R_390_GOTPCDBL: |
| 2494 | /* Use global offset table as symbol value. */ |
| 2495 | relocation = s390_got_pointer (info); |
| 2496 | unresolved_reloc = FALSE; |
| 2497 | break; |
| 2498 | |
| 2499 | case R_390_PLT12DBL: |
| 2500 | case R_390_PLT16DBL: |
| 2501 | case R_390_PLT24DBL: |
| 2502 | case R_390_PLT32: |
| 2503 | case R_390_PLT32DBL: |
| 2504 | case R_390_PLT64: |
| 2505 | /* Relocation is to the entry for this symbol in the |
| 2506 | procedure linkage table. */ |
| 2507 | |
| 2508 | /* Resolve a PLT32 reloc against a local symbol directly, |
| 2509 | without using the procedure linkage table. */ |
| 2510 | if (h == NULL) |
| 2511 | break; |
| 2512 | |
| 2513 | if (h->plt.offset == (bfd_vma) -1 |
| 2514 | || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h))) |
| 2515 | { |
| 2516 | /* We didn't make a PLT entry for this symbol. This |
| 2517 | happens when statically linking PIC code, or when |
| 2518 | using -Bsymbolic. */ |
| 2519 | break; |
| 2520 | } |
| 2521 | if (s390_is_ifunc_symbol_p (h)) |
| 2522 | relocation = (htab->elf.iplt->output_section->vma |
| 2523 | + htab->elf.iplt->output_offset |
| 2524 | + h->plt.offset); |
| 2525 | else |
| 2526 | relocation = (htab->elf.splt->output_section->vma |
| 2527 | + htab->elf.splt->output_offset |
| 2528 | + h->plt.offset); |
| 2529 | unresolved_reloc = FALSE; |
| 2530 | break; |
| 2531 | |
| 2532 | case R_390_PLTOFF16: |
| 2533 | case R_390_PLTOFF32: |
| 2534 | case R_390_PLTOFF64: |
| 2535 | /* Relocation is to the entry for this symbol in the |
| 2536 | procedure linkage table relative to the start of the GOT. */ |
| 2537 | |
| 2538 | /* For local symbols or if we didn't make a PLT entry for |
| 2539 | this symbol resolve the symbol directly. */ |
| 2540 | if (h == NULL |
| 2541 | || h->plt.offset == (bfd_vma) -1 |
| 2542 | || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h))) |
| 2543 | { |
| 2544 | relocation -= s390_got_pointer (info); |
| 2545 | break; |
| 2546 | } |
| 2547 | |
| 2548 | if (s390_is_ifunc_symbol_p (h)) |
| 2549 | relocation = (htab->elf.iplt->output_section->vma |
| 2550 | + htab->elf.iplt->output_offset |
| 2551 | + h->plt.offset |
| 2552 | - s390_got_pointer (info)); |
| 2553 | else |
| 2554 | relocation = (htab->elf.splt->output_section->vma |
| 2555 | + htab->elf.splt->output_offset |
| 2556 | + h->plt.offset |
| 2557 | - s390_got_pointer (info)); |
| 2558 | unresolved_reloc = FALSE; |
| 2559 | break; |
| 2560 | |
| 2561 | case R_390_PC16: |
| 2562 | case R_390_PC12DBL: |
| 2563 | case R_390_PC16DBL: |
| 2564 | case R_390_PC24DBL: |
| 2565 | case R_390_PC32: |
| 2566 | case R_390_PC32DBL: |
| 2567 | case R_390_PC64: |
| 2568 | if (h != NULL |
| 2569 | && bfd_link_pie (info) |
| 2570 | && !h->def_regular) |
| 2571 | { |
| 2572 | _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined " |
| 2573 | "in shared library and accessed " |
| 2574 | "from executable " |
| 2575 | "(rebuild file with -fPIC ?)"), |
| 2576 | input_bfd, h->root.root.string); |
| 2577 | bfd_set_error (bfd_error_bad_value); |
| 2578 | return FALSE; |
| 2579 | } |
| 2580 | /* The target of these relocs are instruction operands |
| 2581 | residing in read-only sections. We cannot emit a runtime |
| 2582 | reloc for it. */ |
| 2583 | if (h != NULL |
| 2584 | && s390_is_ifunc_symbol_p (h) |
| 2585 | && h->def_regular |
| 2586 | && bfd_link_pic (info)) |
| 2587 | { |
| 2588 | relocation = (htab->elf.iplt->output_section->vma |
| 2589 | + htab->elf.iplt->output_offset |
| 2590 | + h->plt.offset); |
| 2591 | goto do_relocation; |
| 2592 | } |
| 2593 | /* Fall through. */ |
| 2594 | |
| 2595 | case R_390_8: |
| 2596 | case R_390_16: |
| 2597 | case R_390_32: |
| 2598 | case R_390_64: |
| 2599 | |
| 2600 | if ((input_section->flags & SEC_ALLOC) == 0) |
| 2601 | break; |
| 2602 | |
| 2603 | if (h != NULL |
| 2604 | && s390_is_ifunc_symbol_p (h) |
| 2605 | && h->def_regular) |
| 2606 | { |
| 2607 | if (!bfd_link_pic (info)) |
| 2608 | { |
| 2609 | /* For a non-shared object the symbol will not |
| 2610 | change. Hence we can write the address of the |
| 2611 | target IPLT slot now. */ |
| 2612 | relocation = (htab->elf.iplt->output_section->vma |
| 2613 | + htab->elf.iplt->output_offset |
| 2614 | + h ->plt.offset); |
| 2615 | goto do_relocation; |
| 2616 | } |
| 2617 | else |
| 2618 | { |
| 2619 | /* For shared objects a runtime relocation is needed. */ |
| 2620 | |
| 2621 | Elf_Internal_Rela outrel; |
| 2622 | asection *sreloc; |
| 2623 | |
| 2624 | /* Need a dynamic relocation to get the real function |
| 2625 | address. */ |
| 2626 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
| 2627 | info, |
| 2628 | input_section, |
| 2629 | rel->r_offset); |
| 2630 | if (outrel.r_offset == (bfd_vma) -1 |
| 2631 | || outrel.r_offset == (bfd_vma) -2) |
| 2632 | abort (); |
| 2633 | |
| 2634 | outrel.r_offset += (input_section->output_section->vma |
| 2635 | + input_section->output_offset); |
| 2636 | |
| 2637 | if (h->dynindx == -1 |
| 2638 | || h->forced_local |
| 2639 | || bfd_link_executable (info)) |
| 2640 | { |
| 2641 | /* This symbol is resolved locally. */ |
| 2642 | outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE); |
| 2643 | outrel.r_addend = (h->root.u.def.value |
| 2644 | + h->root.u.def.section->output_section->vma |
| 2645 | + h->root.u.def.section->output_offset); |
| 2646 | } |
| 2647 | else |
| 2648 | { |
| 2649 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); |
| 2650 | outrel.r_addend = 0; |
| 2651 | } |
| 2652 | |
| 2653 | sreloc = htab->elf.irelifunc; |
| 2654 | elf_append_rela (output_bfd, sreloc, &outrel); |
| 2655 | |
| 2656 | /* If this reloc is against an external symbol, we |
| 2657 | do not want to fiddle with the addend. Otherwise, |
| 2658 | we need to include the symbol value so that it |
| 2659 | becomes an addend for the dynamic reloc. For an |
| 2660 | internal symbol, we have updated addend. */ |
| 2661 | continue; |
| 2662 | } |
| 2663 | } |
| 2664 | |
| 2665 | if ((bfd_link_pic (info) |
| 2666 | && (h == NULL |
| 2667 | || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 2668 | && !resolved_to_zero) |
| 2669 | || h->root.type != bfd_link_hash_undefweak) |
| 2670 | && ((r_type != R_390_PC16 |
| 2671 | && r_type != R_390_PC12DBL |
| 2672 | && r_type != R_390_PC16DBL |
| 2673 | && r_type != R_390_PC24DBL |
| 2674 | && r_type != R_390_PC32 |
| 2675 | && r_type != R_390_PC32DBL |
| 2676 | && r_type != R_390_PC64) |
| 2677 | || !SYMBOL_CALLS_LOCAL (info, h))) |
| 2678 | || (ELIMINATE_COPY_RELOCS |
| 2679 | && !bfd_link_pic (info) |
| 2680 | && h != NULL |
| 2681 | && h->dynindx != -1 |
| 2682 | && !h->non_got_ref |
| 2683 | && ((h->def_dynamic |
| 2684 | && !h->def_regular) |
| 2685 | || h->root.type == bfd_link_hash_undefweak |
| 2686 | || h->root.type == bfd_link_hash_undefined))) |
| 2687 | { |
| 2688 | Elf_Internal_Rela outrel; |
| 2689 | bfd_boolean skip, relocate; |
| 2690 | asection *sreloc; |
| 2691 | bfd_byte *loc; |
| 2692 | |
| 2693 | /* When generating a shared object, these relocations |
| 2694 | are copied into the output file to be resolved at run |
| 2695 | time. */ |
| 2696 | skip = FALSE; |
| 2697 | relocate = FALSE; |
| 2698 | |
| 2699 | outrel.r_offset = |
| 2700 | _bfd_elf_section_offset (output_bfd, info, input_section, |
| 2701 | rel->r_offset); |
| 2702 | if (outrel.r_offset == (bfd_vma) -1) |
| 2703 | skip = TRUE; |
| 2704 | else if (outrel.r_offset == (bfd_vma) -2) |
| 2705 | skip = TRUE, relocate = TRUE; |
| 2706 | |
| 2707 | outrel.r_offset += (input_section->output_section->vma |
| 2708 | + input_section->output_offset); |
| 2709 | |
| 2710 | if (skip) |
| 2711 | memset (&outrel, 0, sizeof outrel); |
| 2712 | else if (h != NULL |
| 2713 | && h->dynindx != -1 |
| 2714 | && (r_type == R_390_PC16 |
| 2715 | || r_type == R_390_PC12DBL |
| 2716 | || r_type == R_390_PC16DBL |
| 2717 | || r_type == R_390_PC24DBL |
| 2718 | || r_type == R_390_PC32 |
| 2719 | || r_type == R_390_PC32DBL |
| 2720 | || r_type == R_390_PC64 |
| 2721 | || !bfd_link_pic (info) |
| 2722 | || !SYMBOLIC_BIND (info, h) |
| 2723 | || !h->def_regular)) |
| 2724 | { |
| 2725 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); |
| 2726 | outrel.r_addend = rel->r_addend; |
| 2727 | } |
| 2728 | else |
| 2729 | { |
| 2730 | /* This symbol is local, or marked to become local. */ |
| 2731 | outrel.r_addend = relocation + rel->r_addend; |
| 2732 | if (r_type == R_390_64) |
| 2733 | { |
| 2734 | relocate = TRUE; |
| 2735 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); |
| 2736 | } |
| 2737 | else |
| 2738 | { |
| 2739 | long sindx; |
| 2740 | |
| 2741 | if (bfd_is_abs_section (sec)) |
| 2742 | sindx = 0; |
| 2743 | else if (sec == NULL || sec->owner == NULL) |
| 2744 | { |
| 2745 | bfd_set_error(bfd_error_bad_value); |
| 2746 | return FALSE; |
| 2747 | } |
| 2748 | else |
| 2749 | { |
| 2750 | asection *osec; |
| 2751 | |
| 2752 | osec = sec->output_section; |
| 2753 | sindx = elf_section_data (osec)->dynindx; |
| 2754 | |
| 2755 | if (sindx == 0) |
| 2756 | { |
| 2757 | osec = htab->elf.text_index_section; |
| 2758 | sindx = elf_section_data (osec)->dynindx; |
| 2759 | } |
| 2760 | BFD_ASSERT (sindx != 0); |
| 2761 | |
| 2762 | /* We are turning this relocation into one |
| 2763 | against a section symbol, so subtract out |
| 2764 | the output section's address but not the |
| 2765 | offset of the input section in the output |
| 2766 | section. */ |
| 2767 | outrel.r_addend -= osec->vma; |
| 2768 | } |
| 2769 | outrel.r_info = ELF64_R_INFO (sindx, r_type); |
| 2770 | } |
| 2771 | } |
| 2772 | |
| 2773 | sreloc = elf_section_data (input_section)->sreloc; |
| 2774 | if (sreloc == NULL) |
| 2775 | abort (); |
| 2776 | |
| 2777 | loc = sreloc->contents; |
| 2778 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); |
| 2779 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| 2780 | |
| 2781 | /* If this reloc is against an external symbol, we do |
| 2782 | not want to fiddle with the addend. Otherwise, we |
| 2783 | need to include the symbol value so that it becomes |
| 2784 | an addend for the dynamic reloc. */ |
| 2785 | if (! relocate) |
| 2786 | continue; |
| 2787 | } |
| 2788 | |
| 2789 | break; |
| 2790 | |
| 2791 | /* Relocations for tls literal pool entries. */ |
| 2792 | case R_390_TLS_IE64: |
| 2793 | if (bfd_link_pic (info)) |
| 2794 | { |
| 2795 | Elf_Internal_Rela outrel; |
| 2796 | asection *sreloc; |
| 2797 | bfd_byte *loc; |
| 2798 | |
| 2799 | outrel.r_offset = rel->r_offset |
| 2800 | + input_section->output_section->vma |
| 2801 | + input_section->output_offset; |
| 2802 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); |
| 2803 | sreloc = elf_section_data (input_section)->sreloc; |
| 2804 | if (sreloc == NULL) |
| 2805 | abort (); |
| 2806 | loc = sreloc->contents; |
| 2807 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); |
| 2808 | bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc); |
| 2809 | } |
| 2810 | /* Fall through. */ |
| 2811 | |
| 2812 | case R_390_TLS_GD64: |
| 2813 | case R_390_TLS_GOTIE64: |
| 2814 | r_type = elf_s390_tls_transition (info, r_type, h == NULL); |
| 2815 | tls_type = GOT_UNKNOWN; |
| 2816 | if (h == NULL && local_got_offsets) |
| 2817 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; |
| 2818 | else if (h != NULL) |
| 2819 | { |
| 2820 | tls_type = elf_s390_hash_entry(h)->tls_type; |
| 2821 | if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE) |
| 2822 | r_type = R_390_TLS_LE64; |
| 2823 | } |
| 2824 | if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE) |
| 2825 | r_type = R_390_TLS_IE64; |
| 2826 | |
| 2827 | if (r_type == R_390_TLS_LE64) |
| 2828 | { |
| 2829 | /* This relocation gets optimized away by the local exec |
| 2830 | access optimization. */ |
| 2831 | BFD_ASSERT (! unresolved_reloc); |
| 2832 | bfd_put_64 (output_bfd, -tpoff (info, relocation), |
| 2833 | contents + rel->r_offset); |
| 2834 | continue; |
| 2835 | } |
| 2836 | |
| 2837 | if (htab->elf.sgot == NULL) |
| 2838 | abort (); |
| 2839 | |
| 2840 | if (h != NULL) |
| 2841 | off = h->got.offset; |
| 2842 | else |
| 2843 | { |
| 2844 | if (local_got_offsets == NULL) |
| 2845 | abort (); |
| 2846 | |
| 2847 | off = local_got_offsets[r_symndx]; |
| 2848 | } |
| 2849 | |
| 2850 | emit_tls_relocs: |
| 2851 | |
| 2852 | if ((off & 1) != 0) |
| 2853 | off &= ~1; |
| 2854 | else |
| 2855 | { |
| 2856 | Elf_Internal_Rela outrel; |
| 2857 | bfd_byte *loc; |
| 2858 | int dr_type, indx; |
| 2859 | |
| 2860 | if (htab->elf.srelgot == NULL) |
| 2861 | abort (); |
| 2862 | |
| 2863 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
| 2864 | + htab->elf.sgot->output_offset + off); |
| 2865 | |
| 2866 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
| 2867 | if (r_type == R_390_TLS_GD64) |
| 2868 | dr_type = R_390_TLS_DTPMOD; |
| 2869 | else |
| 2870 | dr_type = R_390_TLS_TPOFF; |
| 2871 | if (dr_type == R_390_TLS_TPOFF && indx == 0) |
| 2872 | outrel.r_addend = relocation - dtpoff_base (info); |
| 2873 | else |
| 2874 | outrel.r_addend = 0; |
| 2875 | outrel.r_info = ELF64_R_INFO (indx, dr_type); |
| 2876 | loc = htab->elf.srelgot->contents; |
| 2877 | loc += htab->elf.srelgot->reloc_count++ |
| 2878 | * sizeof (Elf64_External_Rela); |
| 2879 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| 2880 | |
| 2881 | if (r_type == R_390_TLS_GD64) |
| 2882 | { |
| 2883 | if (indx == 0) |
| 2884 | { |
| 2885 | BFD_ASSERT (! unresolved_reloc); |
| 2886 | bfd_put_64 (output_bfd, |
| 2887 | relocation - dtpoff_base (info), |
| 2888 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
| 2889 | } |
| 2890 | else |
| 2891 | { |
| 2892 | outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF); |
| 2893 | outrel.r_offset += GOT_ENTRY_SIZE; |
| 2894 | outrel.r_addend = 0; |
| 2895 | htab->elf.srelgot->reloc_count++; |
| 2896 | loc += sizeof (Elf64_External_Rela); |
| 2897 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| 2898 | } |
| 2899 | } |
| 2900 | |
| 2901 | if (h != NULL) |
| 2902 | h->got.offset |= 1; |
| 2903 | else |
| 2904 | local_got_offsets[r_symndx] |= 1; |
| 2905 | } |
| 2906 | |
| 2907 | if (off >= (bfd_vma) -2) |
| 2908 | abort (); |
| 2909 | if (r_type == ELF64_R_TYPE (rel->r_info)) |
| 2910 | { |
| 2911 | relocation = htab->elf.sgot->output_offset + off; |
| 2912 | if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT) |
| 2913 | relocation += htab->elf.sgot->output_section->vma; |
| 2914 | unresolved_reloc = FALSE; |
| 2915 | } |
| 2916 | else |
| 2917 | { |
| 2918 | bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off, |
| 2919 | contents + rel->r_offset); |
| 2920 | continue; |
| 2921 | } |
| 2922 | break; |
| 2923 | |
| 2924 | case R_390_TLS_GOTIE12: |
| 2925 | case R_390_TLS_GOTIE20: |
| 2926 | case R_390_TLS_IEENT: |
| 2927 | if (h == NULL) |
| 2928 | { |
| 2929 | if (local_got_offsets == NULL) |
| 2930 | abort(); |
| 2931 | off = local_got_offsets[r_symndx]; |
| 2932 | if (bfd_link_pic (info)) |
| 2933 | goto emit_tls_relocs; |
| 2934 | } |
| 2935 | else |
| 2936 | { |
| 2937 | off = h->got.offset; |
| 2938 | tls_type = elf_s390_hash_entry(h)->tls_type; |
| 2939 | if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE) |
| 2940 | goto emit_tls_relocs; |
| 2941 | } |
| 2942 | |
| 2943 | if (htab->elf.sgot == NULL) |
| 2944 | abort (); |
| 2945 | |
| 2946 | BFD_ASSERT (! unresolved_reloc); |
| 2947 | bfd_put_64 (output_bfd, -tpoff (info, relocation), |
| 2948 | htab->elf.sgot->contents + off); |
| 2949 | relocation = htab->elf.sgot->output_offset + off; |
| 2950 | if (r_type == R_390_TLS_IEENT) |
| 2951 | relocation += htab->elf.sgot->output_section->vma; |
| 2952 | unresolved_reloc = FALSE; |
| 2953 | break; |
| 2954 | |
| 2955 | case R_390_TLS_LDM64: |
| 2956 | if (! bfd_link_pic (info)) |
| 2957 | /* The literal pool entry this relocation refers to gets ignored |
| 2958 | by the optimized code of the local exec model. Do nothing |
| 2959 | and the value will turn out zero. */ |
| 2960 | continue; |
| 2961 | |
| 2962 | if (htab->elf.sgot == NULL) |
| 2963 | abort (); |
| 2964 | |
| 2965 | off = htab->tls_ldm_got.offset; |
| 2966 | if (off & 1) |
| 2967 | off &= ~1; |
| 2968 | else |
| 2969 | { |
| 2970 | Elf_Internal_Rela outrel; |
| 2971 | bfd_byte *loc; |
| 2972 | |
| 2973 | if (htab->elf.srelgot == NULL) |
| 2974 | abort (); |
| 2975 | |
| 2976 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
| 2977 | + htab->elf.sgot->output_offset + off); |
| 2978 | |
| 2979 | bfd_put_64 (output_bfd, 0, |
| 2980 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
| 2981 | outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD); |
| 2982 | outrel.r_addend = 0; |
| 2983 | loc = htab->elf.srelgot->contents; |
| 2984 | loc += htab->elf.srelgot->reloc_count++ |
| 2985 | * sizeof (Elf64_External_Rela); |
| 2986 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| 2987 | htab->tls_ldm_got.offset |= 1; |
| 2988 | } |
| 2989 | relocation = htab->elf.sgot->output_offset + off; |
| 2990 | unresolved_reloc = FALSE; |
| 2991 | break; |
| 2992 | |
| 2993 | case R_390_TLS_LE64: |
| 2994 | if (bfd_link_dll (info)) |
| 2995 | { |
| 2996 | /* Linking a shared library with non-fpic code requires |
| 2997 | a R_390_TLS_TPOFF relocation. */ |
| 2998 | Elf_Internal_Rela outrel; |
| 2999 | asection *sreloc; |
| 3000 | bfd_byte *loc; |
| 3001 | int indx; |
| 3002 | |
| 3003 | outrel.r_offset = rel->r_offset |
| 3004 | + input_section->output_section->vma |
| 3005 | + input_section->output_offset; |
| 3006 | if (h != NULL && h->dynindx != -1) |
| 3007 | indx = h->dynindx; |
| 3008 | else |
| 3009 | indx = 0; |
| 3010 | outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF); |
| 3011 | if (indx == 0) |
| 3012 | outrel.r_addend = relocation - dtpoff_base (info); |
| 3013 | else |
| 3014 | outrel.r_addend = 0; |
| 3015 | sreloc = elf_section_data (input_section)->sreloc; |
| 3016 | if (sreloc == NULL) |
| 3017 | abort (); |
| 3018 | loc = sreloc->contents; |
| 3019 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); |
| 3020 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| 3021 | } |
| 3022 | else |
| 3023 | { |
| 3024 | BFD_ASSERT (! unresolved_reloc); |
| 3025 | bfd_put_64 (output_bfd, -tpoff (info, relocation), |
| 3026 | contents + rel->r_offset); |
| 3027 | } |
| 3028 | continue; |
| 3029 | |
| 3030 | case R_390_TLS_LDO64: |
| 3031 | if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING)) |
| 3032 | relocation -= dtpoff_base (info); |
| 3033 | else |
| 3034 | /* When converting LDO to LE, we must negate. */ |
| 3035 | relocation = -tpoff (info, relocation); |
| 3036 | break; |
| 3037 | |
| 3038 | /* Relocations for tls instructions. */ |
| 3039 | case R_390_TLS_LOAD: |
| 3040 | case R_390_TLS_GDCALL: |
| 3041 | case R_390_TLS_LDCALL: |
| 3042 | tls_type = GOT_UNKNOWN; |
| 3043 | if (h == NULL && local_got_offsets) |
| 3044 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; |
| 3045 | else if (h != NULL) |
| 3046 | tls_type = elf_s390_hash_entry(h)->tls_type; |
| 3047 | |
| 3048 | if (tls_type == GOT_TLS_GD) |
| 3049 | continue; |
| 3050 | |
| 3051 | if (r_type == R_390_TLS_LOAD) |
| 3052 | { |
| 3053 | if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1)) |
| 3054 | { |
| 3055 | /* IE->LE transition. Four valid cases: |
| 3056 | lg %rx,(0,%ry) -> sllg %rx,%ry,0 |
| 3057 | lg %rx,(%ry,0) -> sllg %rx,%ry,0 |
| 3058 | lg %rx,(%ry,%r12) -> sllg %rx,%ry,0 |
| 3059 | lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */ |
| 3060 | unsigned int insn0, insn1, ry; |
| 3061 | |
| 3062 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 3063 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); |
| 3064 | if (insn1 != 0x0004) |
| 3065 | { |
| 3066 | invalid_tls_insn (input_bfd, input_section, rel); |
| 3067 | return FALSE; |
| 3068 | } |
| 3069 | if ((insn0 & 0xff00f000) == 0xe3000000) |
| 3070 | /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */ |
| 3071 | ry = (insn0 & 0x000f0000); |
| 3072 | else if ((insn0 & 0xff0f0000) == 0xe3000000) |
| 3073 | /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */ |
| 3074 | ry = (insn0 & 0x0000f000) << 4; |
| 3075 | else if ((insn0 & 0xff00f000) == 0xe300c000) |
| 3076 | /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */ |
| 3077 | ry = (insn0 & 0x000f0000); |
| 3078 | else if ((insn0 & 0xff0f0000) == 0xe30c0000) |
| 3079 | /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */ |
| 3080 | ry = (insn0 & 0x0000f000) << 4; |
| 3081 | else |
| 3082 | { |
| 3083 | invalid_tls_insn (input_bfd, input_section, rel); |
| 3084 | return FALSE; |
| 3085 | } |
| 3086 | insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry; |
| 3087 | insn1 = 0x000d; |
| 3088 | bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); |
| 3089 | bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); |
| 3090 | } |
| 3091 | } |
| 3092 | else if (r_type == R_390_TLS_GDCALL) |
| 3093 | { |
| 3094 | unsigned int insn0, insn1; |
| 3095 | |
| 3096 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 3097 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); |
| 3098 | if ((insn0 & 0xffff0000) != 0xc0e50000) |
| 3099 | { |
| 3100 | invalid_tls_insn (input_bfd, input_section, rel); |
| 3101 | return FALSE; |
| 3102 | } |
| 3103 | if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1)) |
| 3104 | { |
| 3105 | /* GD->LE transition. |
| 3106 | brasl %r14,__tls_get_addr@plt -> brcl 0,. */ |
| 3107 | insn0 = 0xc0040000; |
| 3108 | insn1 = 0x0000; |
| 3109 | } |
| 3110 | else |
| 3111 | { |
| 3112 | /* GD->IE transition. |
| 3113 | brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */ |
| 3114 | insn0 = 0xe322c000; |
| 3115 | insn1 = 0x0004; |
| 3116 | } |
| 3117 | bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); |
| 3118 | bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); |
| 3119 | } |
| 3120 | else if (r_type == R_390_TLS_LDCALL) |
| 3121 | { |
| 3122 | if (!bfd_link_pic (info)) |
| 3123 | { |
| 3124 | unsigned int insn0, insn1; |
| 3125 | |
| 3126 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 3127 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); |
| 3128 | if ((insn0 & 0xffff0000) != 0xc0e50000) |
| 3129 | { |
| 3130 | invalid_tls_insn (input_bfd, input_section, rel); |
| 3131 | return FALSE; |
| 3132 | } |
| 3133 | /* LD->LE transition. |
| 3134 | brasl %r14,__tls_get_addr@plt -> brcl 0,. */ |
| 3135 | insn0 = 0xc0040000; |
| 3136 | insn1 = 0x0000; |
| 3137 | bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); |
| 3138 | bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); |
| 3139 | } |
| 3140 | } |
| 3141 | continue; |
| 3142 | |
| 3143 | default: |
| 3144 | break; |
| 3145 | } |
| 3146 | |
| 3147 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
| 3148 | because such sections are not SEC_ALLOC and thus ld.so will |
| 3149 | not process them. */ |
| 3150 | if (unresolved_reloc |
| 3151 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
| 3152 | && h->def_dynamic) |
| 3153 | && _bfd_elf_section_offset (output_bfd, info, input_section, |
| 3154 | rel->r_offset) != (bfd_vma) -1) |
| 3155 | _bfd_error_handler |
| 3156 | /* xgettext:c-format */ |
| 3157 | (_("%pB(%pA+%#" PRIx64 "): " |
| 3158 | "unresolvable %s relocation against symbol `%s'"), |
| 3159 | input_bfd, |
| 3160 | input_section, |
| 3161 | (uint64_t) rel->r_offset, |
| 3162 | howto->name, |
| 3163 | h->root.root.string); |
| 3164 | |
| 3165 | do_relocation: |
| 3166 | |
| 3167 | /* When applying a 24 bit reloc we need to start one byte |
| 3168 | earlier. Otherwise the 32 bit get/put bfd operations might |
| 3169 | access a byte after the actual section. */ |
| 3170 | if (r_type == R_390_PC24DBL |
| 3171 | || r_type == R_390_PLT24DBL) |
| 3172 | rel->r_offset--; |
| 3173 | |
| 3174 | if (r_type == R_390_20 |
| 3175 | || r_type == R_390_GOT20 |
| 3176 | || r_type == R_390_GOTPLT20 |
| 3177 | || r_type == R_390_TLS_GOTIE20) |
| 3178 | { |
| 3179 | relocation += rel->r_addend; |
| 3180 | relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; |
| 3181 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3182 | contents, rel->r_offset, |
| 3183 | relocation, 0); |
| 3184 | } |
| 3185 | else |
| 3186 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3187 | contents, rel->r_offset, |
| 3188 | relocation, rel->r_addend); |
| 3189 | |
| 3190 | if (r != bfd_reloc_ok) |
| 3191 | { |
| 3192 | const char *name; |
| 3193 | |
| 3194 | if (h != NULL) |
| 3195 | name = h->root.root.string; |
| 3196 | else |
| 3197 | { |
| 3198 | name = bfd_elf_string_from_elf_section (input_bfd, |
| 3199 | symtab_hdr->sh_link, |
| 3200 | sym->st_name); |
| 3201 | if (name == NULL) |
| 3202 | return FALSE; |
| 3203 | if (*name == '\0') |
| 3204 | name = bfd_section_name (input_bfd, sec); |
| 3205 | } |
| 3206 | |
| 3207 | if (r == bfd_reloc_overflow) |
| 3208 | (*info->callbacks->reloc_overflow) |
| 3209 | (info, (h ? &h->root : NULL), name, howto->name, |
| 3210 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); |
| 3211 | else |
| 3212 | { |
| 3213 | _bfd_error_handler |
| 3214 | /* xgettext:c-format */ |
| 3215 | (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"), |
| 3216 | input_bfd, input_section, |
| 3217 | (uint64_t) rel->r_offset, name, (int) r); |
| 3218 | return FALSE; |
| 3219 | } |
| 3220 | } |
| 3221 | } |
| 3222 | |
| 3223 | return TRUE; |
| 3224 | } |
| 3225 | |
| 3226 | /* Generate the PLT slots together with the dynamic relocations needed |
| 3227 | for IFUNC symbols. */ |
| 3228 | |
| 3229 | static void |
| 3230 | elf_s390_finish_ifunc_symbol (bfd *output_bfd, |
| 3231 | struct bfd_link_info *info, |
| 3232 | struct elf_link_hash_entry *h, |
| 3233 | struct elf_s390_link_hash_table *htab, |
| 3234 | bfd_vma plt_offset, |
| 3235 | bfd_vma resolver_address) |
| 3236 | { |
| 3237 | bfd_vma plt_index; |
| 3238 | bfd_vma got_offset; |
| 3239 | Elf_Internal_Rela rela; |
| 3240 | bfd_byte *loc; |
| 3241 | asection *plt, *gotplt, *relplt; |
| 3242 | |
| 3243 | if (htab->elf.iplt == NULL |
| 3244 | || htab->elf.igotplt == NULL |
| 3245 | || htab->elf.irelplt == NULL) |
| 3246 | abort (); |
| 3247 | |
| 3248 | /* Index of the PLT slot within iplt section. */ |
| 3249 | plt_index = plt_offset / PLT_ENTRY_SIZE; |
| 3250 | plt = htab->elf.iplt; |
| 3251 | /* Offset into the igot.plt section. */ |
| 3252 | got_offset = plt_index * GOT_ENTRY_SIZE; |
| 3253 | gotplt = htab->elf.igotplt; |
| 3254 | relplt = htab->elf.irelplt; |
| 3255 | |
| 3256 | /* Fill in the blueprint of a PLT. */ |
| 3257 | memcpy (plt->contents + plt_offset, elf_s390x_plt_entry, |
| 3258 | PLT_ENTRY_SIZE); |
| 3259 | |
| 3260 | /* Fixup the relative address to the GOT entry */ |
| 3261 | bfd_put_32 (output_bfd, |
| 3262 | (gotplt->output_section->vma + |
| 3263 | gotplt->output_offset + got_offset |
| 3264 | - (plt->output_section->vma + |
| 3265 | plt->output_offset + |
| 3266 | plt_offset))/2, |
| 3267 | plt->contents + plt_offset + 2); |
| 3268 | /* Fixup the relative branch to PLT 0 */ |
| 3269 | bfd_put_32 (output_bfd, - (plt->output_offset + |
| 3270 | (PLT_ENTRY_SIZE * plt_index) + 22)/2, |
| 3271 | plt->contents + plt_offset + 24); |
| 3272 | /* Fixup offset into .rela.plt section. */ |
| 3273 | bfd_put_32 (output_bfd, relplt->output_offset + |
| 3274 | plt_index * sizeof (Elf64_External_Rela), |
| 3275 | plt->contents + plt_offset + 28); |
| 3276 | |
| 3277 | /* Fill in the entry in the global offset table. |
| 3278 | Points to instruction after GOT offset. */ |
| 3279 | bfd_put_64 (output_bfd, |
| 3280 | (plt->output_section->vma |
| 3281 | + plt->output_offset |
| 3282 | + plt_offset |
| 3283 | + 14), |
| 3284 | gotplt->contents + got_offset); |
| 3285 | |
| 3286 | /* Fill in the entry in the .rela.plt section. */ |
| 3287 | rela.r_offset = (gotplt->output_section->vma |
| 3288 | + gotplt->output_offset |
| 3289 | + got_offset); |
| 3290 | |
| 3291 | if (!h |
| 3292 | || h->dynindx == -1 |
| 3293 | || ((bfd_link_executable (info) |
| 3294 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| 3295 | && h->def_regular)) |
| 3296 | { |
| 3297 | /* The symbol can be locally resolved. */ |
| 3298 | rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE); |
| 3299 | rela.r_addend = resolver_address; |
| 3300 | } |
| 3301 | else |
| 3302 | { |
| 3303 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); |
| 3304 | rela.r_addend = 0; |
| 3305 | } |
| 3306 | |
| 3307 | loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela); |
| 3308 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| 3309 | } |
| 3310 | |
| 3311 | |
| 3312 | /* Finish up dynamic symbol handling. We set the contents of various |
| 3313 | dynamic sections here. */ |
| 3314 | |
| 3315 | static bfd_boolean |
| 3316 | elf_s390_finish_dynamic_symbol (bfd *output_bfd, |
| 3317 | struct bfd_link_info *info, |
| 3318 | struct elf_link_hash_entry *h, |
| 3319 | Elf_Internal_Sym *sym) |
| 3320 | { |
| 3321 | struct elf_s390_link_hash_table *htab; |
| 3322 | struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h; |
| 3323 | |
| 3324 | htab = elf_s390_hash_table (info); |
| 3325 | if (htab == NULL) |
| 3326 | return FALSE; |
| 3327 | |
| 3328 | if (h->plt.offset != (bfd_vma) -1) |
| 3329 | { |
| 3330 | bfd_vma plt_index; |
| 3331 | bfd_vma gotplt_offset; |
| 3332 | Elf_Internal_Rela rela; |
| 3333 | bfd_byte *loc; |
| 3334 | |
| 3335 | /* This symbol has an entry in the procedure linkage table. Set |
| 3336 | it up. */ |
| 3337 | if (s390_is_ifunc_symbol_p (h) && h->def_regular) |
| 3338 | { |
| 3339 | elf_s390_finish_ifunc_symbol (output_bfd, info, h, |
| 3340 | htab, h->plt.offset, |
| 3341 | eh->ifunc_resolver_address + |
| 3342 | eh->ifunc_resolver_section->output_offset + |
| 3343 | eh->ifunc_resolver_section->output_section->vma); |
| 3344 | |
| 3345 | /* Do not return yet. Handling of explicit GOT slots of |
| 3346 | IFUNC symbols is below. */ |
| 3347 | } |
| 3348 | else |
| 3349 | { |
| 3350 | if (h->dynindx == -1 |
| 3351 | || htab->elf.splt == NULL |
| 3352 | || htab->elf.sgotplt == NULL |
| 3353 | || htab->elf.srelplt == NULL) |
| 3354 | abort (); |
| 3355 | |
| 3356 | /* Calc. index no. |
| 3357 | Current offset - size first entry / entry size. */ |
| 3358 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; |
| 3359 | |
| 3360 | /* The slots in the .got.plt correspond to the PLT slots in |
| 3361 | the same order. */ |
| 3362 | gotplt_offset = plt_index * GOT_ENTRY_SIZE; |
| 3363 | |
| 3364 | /* If .got.plt comes first it needs to contain the 3 header |
| 3365 | entries. */ |
| 3366 | if (!s390_gotplt_after_got_p (info)) |
| 3367 | gotplt_offset += 3 * GOT_ENTRY_SIZE; |
| 3368 | |
| 3369 | /* Fill in the blueprint of a PLT. */ |
| 3370 | memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry, |
| 3371 | PLT_ENTRY_SIZE); |
| 3372 | |
| 3373 | /* The first instruction in the PLT entry is a LARL loading |
| 3374 | the address of the GOT slot. We write the 4 byte |
| 3375 | immediate operand of the LARL instruction here. */ |
| 3376 | bfd_put_32 (output_bfd, |
| 3377 | (htab->elf.sgotplt->output_section->vma + |
| 3378 | htab->elf.sgotplt->output_offset + gotplt_offset |
| 3379 | - (htab->elf.splt->output_section->vma + |
| 3380 | htab->elf.splt->output_offset + |
| 3381 | h->plt.offset))/2, |
| 3382 | htab->elf.splt->contents + h->plt.offset + 2); |
| 3383 | /* Fixup the relative branch to PLT 0 */ |
| 3384 | bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE + |
| 3385 | (PLT_ENTRY_SIZE * plt_index) + 22)/2, |
| 3386 | htab->elf.splt->contents + h->plt.offset + 24); |
| 3387 | /* Fixup offset into .rela.plt section. */ |
| 3388 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela), |
| 3389 | htab->elf.splt->contents + h->plt.offset + 28); |
| 3390 | |
| 3391 | /* Fill in the entry in the global offset table. |
| 3392 | Points to instruction after GOT offset. */ |
| 3393 | bfd_put_64 (output_bfd, |
| 3394 | (htab->elf.splt->output_section->vma |
| 3395 | + htab->elf.splt->output_offset |
| 3396 | + h->plt.offset |
| 3397 | + 14), |
| 3398 | htab->elf.sgotplt->contents + gotplt_offset); |
| 3399 | |
| 3400 | /* Fill in the entry in the .rela.plt section. */ |
| 3401 | rela.r_offset = (htab->elf.sgotplt->output_section->vma |
| 3402 | + htab->elf.sgotplt->output_offset |
| 3403 | + gotplt_offset); |
| 3404 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); |
| 3405 | rela.r_addend = 0; |
| 3406 | loc = htab->elf.srelplt->contents + plt_index * |
| 3407 | sizeof (Elf64_External_Rela); |
| 3408 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| 3409 | |
| 3410 | if (!h->def_regular) |
| 3411 | { |
| 3412 | /* Mark the symbol as undefined, rather than as defined in |
| 3413 | the .plt section. Leave the value alone. This is a clue |
| 3414 | for the dynamic linker, to make function pointer |
| 3415 | comparisons work between an application and shared |
| 3416 | library. */ |
| 3417 | sym->st_shndx = SHN_UNDEF; |
| 3418 | } |
| 3419 | } |
| 3420 | } |
| 3421 | |
| 3422 | if (h->got.offset != (bfd_vma) -1 |
| 3423 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD |
| 3424 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE |
| 3425 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) |
| 3426 | { |
| 3427 | Elf_Internal_Rela rela; |
| 3428 | bfd_byte *loc; |
| 3429 | |
| 3430 | /* This symbol has an entry in the global offset table. Set it |
| 3431 | up. */ |
| 3432 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
| 3433 | abort (); |
| 3434 | |
| 3435 | rela.r_offset = (htab->elf.sgot->output_section->vma |
| 3436 | + htab->elf.sgot->output_offset |
| 3437 | + (h->got.offset &~ (bfd_vma) 1)); |
| 3438 | |
| 3439 | if (h->def_regular && s390_is_ifunc_symbol_p (h)) |
| 3440 | { |
| 3441 | if (bfd_link_pic (info)) |
| 3442 | { |
| 3443 | /* An explicit GOT slot usage needs GLOB_DAT. If the |
| 3444 | symbol references local the implicit got.iplt slot |
| 3445 | will be used and the IRELATIVE reloc has been created |
| 3446 | above. */ |
| 3447 | goto do_glob_dat; |
| 3448 | } |
| 3449 | else |
| 3450 | { |
| 3451 | /* For non-shared objects explicit GOT slots must be |
| 3452 | filled with the PLT slot address for pointer |
| 3453 | equality reasons. */ |
| 3454 | bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma |
| 3455 | + htab->elf.iplt->output_offset |
| 3456 | + h->plt.offset), |
| 3457 | htab->elf.sgot->contents + h->got.offset); |
| 3458 | return TRUE; |
| 3459 | } |
| 3460 | } |
| 3461 | else if (bfd_link_pic (info) |
| 3462 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 3463 | { |
| 3464 | if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
| 3465 | return TRUE; |
| 3466 | |
| 3467 | /* If this is a static link, or it is a -Bsymbolic link and |
| 3468 | the symbol is defined locally or was forced to be local |
| 3469 | because of a version file, we just want to emit a |
| 3470 | RELATIVE reloc. The entry in the global offset table |
| 3471 | will already have been initialized in the |
| 3472 | relocate_section function. */ |
| 3473 | if (!(h->def_regular || ELF_COMMON_DEF_P (h))) |
| 3474 | return FALSE; |
| 3475 | BFD_ASSERT((h->got.offset & 1) != 0); |
| 3476 | rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE); |
| 3477 | rela.r_addend = (h->root.u.def.value |
| 3478 | + h->root.u.def.section->output_section->vma |
| 3479 | + h->root.u.def.section->output_offset); |
| 3480 | } |
| 3481 | else |
| 3482 | { |
| 3483 | BFD_ASSERT((h->got.offset & 1) == 0); |
| 3484 | do_glob_dat: |
| 3485 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset); |
| 3486 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT); |
| 3487 | rela.r_addend = 0; |
| 3488 | } |
| 3489 | |
| 3490 | loc = htab->elf.srelgot->contents; |
| 3491 | loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela); |
| 3492 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| 3493 | } |
| 3494 | |
| 3495 | if (h->needs_copy) |
| 3496 | { |
| 3497 | Elf_Internal_Rela rela; |
| 3498 | asection *s; |
| 3499 | bfd_byte *loc; |
| 3500 | |
| 3501 | /* This symbols needs a copy reloc. Set it up. */ |
| 3502 | |
| 3503 | if (h->dynindx == -1 |
| 3504 | || (h->root.type != bfd_link_hash_defined |
| 3505 | && h->root.type != bfd_link_hash_defweak) |
| 3506 | || htab->elf.srelbss == NULL) |
| 3507 | abort (); |
| 3508 | |
| 3509 | rela.r_offset = (h->root.u.def.value |
| 3510 | + h->root.u.def.section->output_section->vma |
| 3511 | + h->root.u.def.section->output_offset); |
| 3512 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY); |
| 3513 | rela.r_addend = 0; |
| 3514 | if (h->root.u.def.section == htab->elf.sdynrelro) |
| 3515 | s = htab->elf.sreldynrelro; |
| 3516 | else |
| 3517 | s = htab->elf.srelbss; |
| 3518 | loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela); |
| 3519 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| 3520 | } |
| 3521 | |
| 3522 | /* Mark some specially defined symbols as absolute. */ |
| 3523 | if (h == htab->elf.hdynamic |
| 3524 | || h == htab->elf.hgot |
| 3525 | || h == htab->elf.hplt) |
| 3526 | sym->st_shndx = SHN_ABS; |
| 3527 | |
| 3528 | return TRUE; |
| 3529 | } |
| 3530 | |
| 3531 | /* Used to decide how to sort relocs in an optimal manner for the |
| 3532 | dynamic linker, before writing them out. */ |
| 3533 | |
| 3534 | static enum elf_reloc_type_class |
| 3535 | elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 3536 | const asection *rel_sec ATTRIBUTE_UNUSED, |
| 3537 | const Elf_Internal_Rela *rela) |
| 3538 | { |
| 3539 | bfd *abfd = info->output_bfd; |
| 3540 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 3541 | struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info); |
| 3542 | unsigned long r_symndx = ELF64_R_SYM (rela->r_info); |
| 3543 | Elf_Internal_Sym sym; |
| 3544 | |
| 3545 | if (htab->elf.dynsym == NULL |
| 3546 | || !bed->s->swap_symbol_in (abfd, |
| 3547 | (htab->elf.dynsym->contents |
| 3548 | + r_symndx * bed->s->sizeof_sym), |
| 3549 | 0, &sym)) |
| 3550 | abort (); |
| 3551 | |
| 3552 | /* Check relocation against STT_GNU_IFUNC symbol. */ |
| 3553 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
| 3554 | return reloc_class_ifunc; |
| 3555 | |
| 3556 | switch ((int) ELF64_R_TYPE (rela->r_info)) |
| 3557 | { |
| 3558 | case R_390_RELATIVE: |
| 3559 | return reloc_class_relative; |
| 3560 | case R_390_JMP_SLOT: |
| 3561 | return reloc_class_plt; |
| 3562 | case R_390_COPY: |
| 3563 | return reloc_class_copy; |
| 3564 | default: |
| 3565 | return reloc_class_normal; |
| 3566 | } |
| 3567 | } |
| 3568 | |
| 3569 | /* Finish up the dynamic sections. */ |
| 3570 | |
| 3571 | static bfd_boolean |
| 3572 | elf_s390_finish_dynamic_sections (bfd *output_bfd, |
| 3573 | struct bfd_link_info *info) |
| 3574 | { |
| 3575 | struct elf_s390_link_hash_table *htab; |
| 3576 | bfd *dynobj; |
| 3577 | asection *sdyn; |
| 3578 | bfd *ibfd; |
| 3579 | unsigned int i; |
| 3580 | |
| 3581 | htab = elf_s390_hash_table (info); |
| 3582 | if (htab == NULL) |
| 3583 | return FALSE; |
| 3584 | |
| 3585 | dynobj = htab->elf.dynobj; |
| 3586 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| 3587 | |
| 3588 | if (htab->elf.dynamic_sections_created) |
| 3589 | { |
| 3590 | Elf64_External_Dyn *dyncon, *dynconend; |
| 3591 | |
| 3592 | if (sdyn == NULL || htab->elf.sgot == NULL) |
| 3593 | abort (); |
| 3594 | |
| 3595 | dyncon = (Elf64_External_Dyn *) sdyn->contents; |
| 3596 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); |
| 3597 | for (; dyncon < dynconend; dyncon++) |
| 3598 | { |
| 3599 | Elf_Internal_Dyn dyn; |
| 3600 | asection *s; |
| 3601 | |
| 3602 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); |
| 3603 | |
| 3604 | switch (dyn.d_tag) |
| 3605 | { |
| 3606 | default: |
| 3607 | continue; |
| 3608 | |
| 3609 | case DT_PLTGOT: |
| 3610 | /* DT_PLTGOT matches _GLOBAL_OFFSET_TABLE_ */ |
| 3611 | dyn.d_un.d_ptr = s390_got_pointer (info); |
| 3612 | break; |
| 3613 | |
| 3614 | case DT_JMPREL: |
| 3615 | s = htab->elf.srelplt; |
| 3616 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 3617 | break; |
| 3618 | |
| 3619 | case DT_PLTRELSZ: |
| 3620 | dyn.d_un.d_val = htab->elf.srelplt->size; |
| 3621 | if (htab->elf.irelplt) |
| 3622 | dyn.d_un.d_val += htab->elf.irelplt->size; |
| 3623 | break; |
| 3624 | |
| 3625 | case DT_RELASZ: |
| 3626 | /* The procedure linkage table relocs (DT_JMPREL) should |
| 3627 | not be included in the overall relocs (DT_RELA). |
| 3628 | Therefore, we override the DT_RELASZ entry here to |
| 3629 | make it not include the JMPREL relocs. Since the |
| 3630 | linker script arranges for .rela.plt to follow all |
| 3631 | other relocation sections, we don't have to worry |
| 3632 | about changing the DT_RELA entry. */ |
| 3633 | dyn.d_un.d_val -= htab->elf.srelplt->size; |
| 3634 | if (htab->elf.irelplt) |
| 3635 | dyn.d_un.d_val -= htab->elf.irelplt->size; |
| 3636 | break; |
| 3637 | } |
| 3638 | |
| 3639 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 3640 | } |
| 3641 | |
| 3642 | /* Fill in the special first entry in the procedure linkage table. */ |
| 3643 | if (htab->elf.splt && htab->elf.splt->size > 0) |
| 3644 | { |
| 3645 | /* fill in blueprint for plt 0 entry */ |
| 3646 | memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry, |
| 3647 | PLT_FIRST_ENTRY_SIZE); |
| 3648 | /* The second instruction in the first PLT entry is a LARL |
| 3649 | loading the GOT pointer. Fill in the LARL immediate |
| 3650 | address. */ |
| 3651 | bfd_put_32 (output_bfd, |
| 3652 | (s390_got_pointer (info) |
| 3653 | - htab->elf.splt->output_section->vma |
| 3654 | - htab->elf.splt->output_offset - 6)/2, |
| 3655 | htab->elf.splt->contents + 8); |
| 3656 | } |
| 3657 | if (elf_section_data (htab->elf.splt->output_section) != NULL) |
| 3658 | elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize |
| 3659 | = PLT_ENTRY_SIZE; |
| 3660 | } |
| 3661 | |
| 3662 | if (htab->elf.hgot && htab->elf.hgot->root.u.def.section) |
| 3663 | { |
| 3664 | /* Fill in the first three entries in the global offset table. */ |
| 3665 | if (htab->elf.hgot->root.u.def.section->size > 0) |
| 3666 | { |
| 3667 | bfd_put_64 (output_bfd, |
| 3668 | (sdyn == NULL ? (bfd_vma) 0 |
| 3669 | : sdyn->output_section->vma + sdyn->output_offset), |
| 3670 | htab->elf.hgot->root.u.def.section->contents); |
| 3671 | /* One entry for shared object struct ptr. */ |
| 3672 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
| 3673 | htab->elf.hgot->root.u.def.section->contents + 8); |
| 3674 | /* One entry for _dl_runtime_resolve. */ |
| 3675 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
| 3676 | htab->elf.hgot->root.u.def.section->contents + 16); |
| 3677 | } |
| 3678 | elf_section_data (htab->elf.sgot->output_section) |
| 3679 | ->this_hdr.sh_entsize = 8; |
| 3680 | } |
| 3681 | |
| 3682 | /* Finish dynamic symbol for local IFUNC symbols. */ |
| 3683 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 3684 | { |
| 3685 | struct plt_entry *local_plt; |
| 3686 | Elf_Internal_Sym *isym; |
| 3687 | Elf_Internal_Shdr *symtab_hdr; |
| 3688 | |
| 3689 | symtab_hdr = &elf_symtab_hdr (ibfd); |
| 3690 | |
| 3691 | if (!is_s390_elf (ibfd)) |
| 3692 | continue; |
| 3693 | |
| 3694 | local_plt = elf_s390_local_plt (ibfd); |
| 3695 | if (local_plt != NULL) |
| 3696 | for (i = 0; i < symtab_hdr->sh_info; i++) |
| 3697 | { |
| 3698 | if (local_plt[i].plt.offset != (bfd_vma) -1) |
| 3699 | { |
| 3700 | asection *sec = local_plt[i].sec; |
| 3701 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i); |
| 3702 | if (isym == NULL) |
| 3703 | return FALSE; |
| 3704 | |
| 3705 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
| 3706 | elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab, |
| 3707 | local_plt[i].plt.offset, |
| 3708 | isym->st_value |
| 3709 | + sec->output_section->vma |
| 3710 | + sec->output_offset); |
| 3711 | |
| 3712 | } |
| 3713 | } |
| 3714 | } |
| 3715 | |
| 3716 | return TRUE; |
| 3717 | } |
| 3718 | \f |
| 3719 | /* Support for core dump NOTE sections. */ |
| 3720 | |
| 3721 | static bfd_boolean |
| 3722 | elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
| 3723 | { |
| 3724 | int offset; |
| 3725 | size_t size; |
| 3726 | |
| 3727 | switch (note->descsz) |
| 3728 | { |
| 3729 | default: |
| 3730 | return FALSE; |
| 3731 | |
| 3732 | case 336: /* sizeof(struct elf_prstatus) on s390x */ |
| 3733 | /* pr_cursig */ |
| 3734 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
| 3735 | |
| 3736 | /* pr_pid */ |
| 3737 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32); |
| 3738 | |
| 3739 | /* pr_reg */ |
| 3740 | offset = 112; |
| 3741 | size = 216; |
| 3742 | break; |
| 3743 | } |
| 3744 | |
| 3745 | /* Make a ".reg/999" section. */ |
| 3746 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| 3747 | size, note->descpos + offset); |
| 3748 | } |
| 3749 | |
| 3750 | static bfd_boolean |
| 3751 | elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
| 3752 | { |
| 3753 | switch (note->descsz) |
| 3754 | { |
| 3755 | default: |
| 3756 | return FALSE; |
| 3757 | |
| 3758 | case 136: /* sizeof(struct elf_prpsinfo) on s390x */ |
| 3759 | elf_tdata (abfd)->core->pid |
| 3760 | = bfd_get_32 (abfd, note->descdata + 24); |
| 3761 | elf_tdata (abfd)->core->program |
| 3762 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
| 3763 | elf_tdata (abfd)->core->command |
| 3764 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
| 3765 | } |
| 3766 | |
| 3767 | /* Note that for some reason, a spurious space is tacked |
| 3768 | onto the end of the args in some (at least one anyway) |
| 3769 | implementations, so strip it off if it exists. */ |
| 3770 | |
| 3771 | { |
| 3772 | char *command = elf_tdata (abfd)->core->command; |
| 3773 | int n = strlen (command); |
| 3774 | |
| 3775 | if (0 < n && command[n - 1] == ' ') |
| 3776 | command[n - 1] = '\0'; |
| 3777 | } |
| 3778 | |
| 3779 | return TRUE; |
| 3780 | } |
| 3781 | |
| 3782 | static char * |
| 3783 | elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz, |
| 3784 | int note_type, ...) |
| 3785 | { |
| 3786 | va_list ap; |
| 3787 | |
| 3788 | switch (note_type) |
| 3789 | { |
| 3790 | default: |
| 3791 | return NULL; |
| 3792 | |
| 3793 | case NT_PRPSINFO: |
| 3794 | { |
| 3795 | char data[136] ATTRIBUTE_NONSTRING = { 0 }; |
| 3796 | const char *fname, *psargs; |
| 3797 | |
| 3798 | va_start (ap, note_type); |
| 3799 | fname = va_arg (ap, const char *); |
| 3800 | psargs = va_arg (ap, const char *); |
| 3801 | va_end (ap); |
| 3802 | |
| 3803 | strncpy (data + 40, fname, 16); |
| 3804 | #if GCC_VERSION == 8000 || GCC_VERSION == 8001 |
| 3805 | DIAGNOSTIC_PUSH; |
| 3806 | /* GCC 8.0 and 8.1 warn about 80 equals destination size with |
| 3807 | -Wstringop-truncation: |
| 3808 | https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643 |
| 3809 | */ |
| 3810 | DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION; |
| 3811 | #endif |
| 3812 | strncpy (data + 56, psargs, 80); |
| 3813 | #if GCC_VERSION == 8000 || GCC_VERSION == 8001 |
| 3814 | DIAGNOSTIC_POP; |
| 3815 | #endif |
| 3816 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
| 3817 | &data, sizeof (data)); |
| 3818 | } |
| 3819 | |
| 3820 | case NT_PRSTATUS: |
| 3821 | { |
| 3822 | char data[336] = { 0 }; |
| 3823 | long pid; |
| 3824 | int cursig; |
| 3825 | const void *gregs; |
| 3826 | |
| 3827 | va_start (ap, note_type); |
| 3828 | pid = va_arg (ap, long); |
| 3829 | cursig = va_arg (ap, int); |
| 3830 | gregs = va_arg (ap, const void *); |
| 3831 | va_end (ap); |
| 3832 | |
| 3833 | bfd_put_16 (abfd, cursig, data + 12); |
| 3834 | bfd_put_32 (abfd, pid, data + 32); |
| 3835 | memcpy (data + 112, gregs, 216); |
| 3836 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
| 3837 | &data, sizeof (data)); |
| 3838 | } |
| 3839 | } |
| 3840 | /* NOTREACHED */ |
| 3841 | } |
| 3842 | \f |
| 3843 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
| 3844 | or (bfd_vma) -1 if it should not be included. */ |
| 3845 | |
| 3846 | static bfd_vma |
| 3847 | elf_s390_plt_sym_val (bfd_vma i, const asection *plt, |
| 3848 | const arelent *rel ATTRIBUTE_UNUSED) |
| 3849 | { |
| 3850 | return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE; |
| 3851 | } |
| 3852 | |
| 3853 | /* Merge backend specific data from an object file to the output |
| 3854 | object file when linking. */ |
| 3855 | |
| 3856 | static bfd_boolean |
| 3857 | elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
| 3858 | { |
| 3859 | if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd)) |
| 3860 | return TRUE; |
| 3861 | |
| 3862 | return elf_s390_merge_obj_attributes (ibfd, info); |
| 3863 | } |
| 3864 | |
| 3865 | /* We may add a PT_S390_PGSTE program header. */ |
| 3866 | |
| 3867 | static int |
| 3868 | elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED, |
| 3869 | struct bfd_link_info *info) |
| 3870 | { |
| 3871 | struct elf_s390_link_hash_table *htab; |
| 3872 | |
| 3873 | if (info) |
| 3874 | { |
| 3875 | htab = elf_s390_hash_table (info); |
| 3876 | if (htab) |
| 3877 | return htab->params->pgste; |
| 3878 | } |
| 3879 | return 0; |
| 3880 | } |
| 3881 | |
| 3882 | |
| 3883 | /* Add the PT_S390_PGSTE program header. */ |
| 3884 | |
| 3885 | static bfd_boolean |
| 3886 | elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info) |
| 3887 | { |
| 3888 | struct elf_s390_link_hash_table *htab; |
| 3889 | struct elf_segment_map *m, *pm = NULL; |
| 3890 | |
| 3891 | if (!abfd || !info) |
| 3892 | return TRUE; |
| 3893 | |
| 3894 | htab = elf_s390_hash_table (info); |
| 3895 | if (!htab || !htab->params->pgste) |
| 3896 | return TRUE; |
| 3897 | |
| 3898 | /* If there is already a PT_S390_PGSTE header, avoid adding |
| 3899 | another. */ |
| 3900 | m = elf_seg_map (abfd); |
| 3901 | while (m && m->p_type != PT_S390_PGSTE) |
| 3902 | { |
| 3903 | pm = m; |
| 3904 | m = m->next; |
| 3905 | } |
| 3906 | |
| 3907 | if (m) |
| 3908 | return TRUE; |
| 3909 | |
| 3910 | m = (struct elf_segment_map *) |
| 3911 | bfd_zalloc (abfd, sizeof (struct elf_segment_map)); |
| 3912 | if (m == NULL) |
| 3913 | return FALSE; |
| 3914 | m->p_type = PT_S390_PGSTE; |
| 3915 | m->count = 0; |
| 3916 | m->next = NULL; |
| 3917 | if (pm) |
| 3918 | pm->next = m; |
| 3919 | |
| 3920 | return TRUE; |
| 3921 | } |
| 3922 | |
| 3923 | bfd_boolean |
| 3924 | bfd_elf_s390_set_options (struct bfd_link_info *info, |
| 3925 | struct s390_elf_params *params) |
| 3926 | { |
| 3927 | struct elf_s390_link_hash_table *htab; |
| 3928 | |
| 3929 | if (info) |
| 3930 | { |
| 3931 | htab = elf_s390_hash_table (info); |
| 3932 | if (htab) |
| 3933 | htab->params = params; |
| 3934 | } |
| 3935 | |
| 3936 | return TRUE; |
| 3937 | } |
| 3938 | |
| 3939 | |
| 3940 | /* Why was the hash table entry size definition changed from |
| 3941 | ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and |
| 3942 | this is the only reason for the s390_elf64_size_info structure. */ |
| 3943 | |
| 3944 | const struct elf_size_info s390_elf64_size_info = |
| 3945 | { |
| 3946 | sizeof (Elf64_External_Ehdr), |
| 3947 | sizeof (Elf64_External_Phdr), |
| 3948 | sizeof (Elf64_External_Shdr), |
| 3949 | sizeof (Elf64_External_Rel), |
| 3950 | sizeof (Elf64_External_Rela), |
| 3951 | sizeof (Elf64_External_Sym), |
| 3952 | sizeof (Elf64_External_Dyn), |
| 3953 | sizeof (Elf_External_Note), |
| 3954 | 8, /* hash-table entry size. */ |
| 3955 | 1, /* internal relocations per external relocations. */ |
| 3956 | 64, /* arch_size. */ |
| 3957 | 3, /* log_file_align. */ |
| 3958 | ELFCLASS64, EV_CURRENT, |
| 3959 | bfd_elf64_write_out_phdrs, |
| 3960 | bfd_elf64_write_shdrs_and_ehdr, |
| 3961 | bfd_elf64_checksum_contents, |
| 3962 | bfd_elf64_write_relocs, |
| 3963 | bfd_elf64_swap_symbol_in, |
| 3964 | bfd_elf64_swap_symbol_out, |
| 3965 | bfd_elf64_slurp_reloc_table, |
| 3966 | bfd_elf64_slurp_symbol_table, |
| 3967 | bfd_elf64_swap_dyn_in, |
| 3968 | bfd_elf64_swap_dyn_out, |
| 3969 | bfd_elf64_swap_reloc_in, |
| 3970 | bfd_elf64_swap_reloc_out, |
| 3971 | bfd_elf64_swap_reloca_in, |
| 3972 | bfd_elf64_swap_reloca_out |
| 3973 | }; |
| 3974 | |
| 3975 | #define TARGET_BIG_SYM s390_elf64_vec |
| 3976 | #define TARGET_BIG_NAME "elf64-s390" |
| 3977 | #define ELF_ARCH bfd_arch_s390 |
| 3978 | #define ELF_TARGET_ID S390_ELF_DATA |
| 3979 | #define ELF_MACHINE_CODE EM_S390 |
| 3980 | #define ELF_MACHINE_ALT1 EM_S390_OLD |
| 3981 | #define ELF_MAXPAGESIZE 0x1000 |
| 3982 | |
| 3983 | #define elf_backend_size_info s390_elf64_size_info |
| 3984 | |
| 3985 | #define elf_backend_can_gc_sections 1 |
| 3986 | #define elf_backend_can_refcount 1 |
| 3987 | #define elf_backend_want_got_plt 1 |
| 3988 | #define elf_backend_plt_readonly 1 |
| 3989 | #define elf_backend_want_plt_sym 0 |
| 3990 | #define elf_backend_got_header_size 24 |
| 3991 | #define elf_backend_want_dynrelro 1 |
| 3992 | #define elf_backend_rela_normal 1 |
| 3993 | |
| 3994 | #define elf_info_to_howto elf_s390_info_to_howto |
| 3995 | |
| 3996 | #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name |
| 3997 | #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create |
| 3998 | #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup |
| 3999 | #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup |
| 4000 | #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data |
| 4001 | |
| 4002 | #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol |
| 4003 | #define elf_backend_check_relocs elf_s390_check_relocs |
| 4004 | #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol |
| 4005 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
| 4006 | #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections |
| 4007 | #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol |
| 4008 | #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook |
| 4009 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
| 4010 | #define elf_backend_relocate_section elf_s390_relocate_section |
| 4011 | #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections |
| 4012 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
| 4013 | #define elf_backend_grok_prstatus elf_s390_grok_prstatus |
| 4014 | #define elf_backend_grok_psinfo elf_s390_grok_psinfo |
| 4015 | #define elf_backend_write_core_note elf_s390_write_core_note |
| 4016 | #define elf_backend_plt_sym_val elf_s390_plt_sym_val |
| 4017 | #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p |
| 4018 | #define elf_backend_additional_program_headers elf_s390_additional_program_headers |
| 4019 | #define elf_backend_modify_segment_map elf_s390_modify_segment_map |
| 4020 | |
| 4021 | #define bfd_elf64_mkobject elf_s390_mkobject |
| 4022 | #define elf_backend_object_p elf_s390_object_p |
| 4023 | |
| 4024 | #include "elf64-target.h" |